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Azithromycin-D5 CAS号 N/A

基本信息

CAS(化学文摘登记)号

N/A

英文名称

Azithromycin-D5

英文化学名

(2R,3S,4R,5R,8R,10R,11R,12S,13S,14R)-11-(((2S,3R,4S,6R)-4-(dimethylamino)-3-hydroxy-6-methyltetrahydro-2H-pyran-2-yl)oxy)-2-ethyl-3,4,10-trihydroxy-13-(((2R,4R,5S,6S)-5-hydroxy-4-methoxy-4,6-dimethyltetrahydro-2H-pyran-2-yl)oxy)-3,5,8,10,12,14-hexamethyl-6-(methyl-d3)-1-oxa-6-azacyclopentadecan-15-one-7,7-d2

简化分子线性输入规范(SMILES)

C[C@H]([C@@H](O[C@@]([H])([C@@H]1O)O[C@@H](C[C@@H]1N(C)C)C)[C@](C[C@@H](C)C([2H])(N(C([2H])([2H])[2H])[C@@H]2C)[2H])(C)O)[C@H](O[C@@]([H])(C[C@]3(OC)C)O[C@H]([C@@H]3O)C)[C@@H](C)C(O[C@H](CC)[C@@](O)([C@@H]2O)C)=O

分子式

C38H67D5N2O12

分子量

754.0

物理性质

外观

安全信息

危险品运输编号

非危险品

德国水污染物质分类清单(WGK Germany)

3

详细规格

测试方法

核磁；质谱，液相色谱

保存条件

常温避光保存

产品描述

Azithromycin-D5 is chemically (2R,3S,4R,5R,8R,10R,11R,12S,13S,14R)-11-(((2S,3R,4S,6R)-4-(dimethylamino)-3-hydroxy-6-methyltetrahydro-2H-pyran-2-yl)oxy)-2-ethyl-3,4,10-trihydroxy-13-(((2R,4R,5S,6S)-5-hydroxy-4-methoxy-4,6-dimethyltetrahydro-2H-pyran-2-yl)oxy)-3,5,8,10,12,14-hexamethyl-6-(methyl-d3)-1-oxa-6-azacyclopentadecan-15-one-7,7-d2. Azithromycin-D5 is supplied with detailed characterization data compliant with regulatory guideline. Azithromycin-D5 can be used for the analytical method development, method validation (AMV), Quality Controlled (QC) application for Abbreviated New Drug Application (ANDA) or during commercial production of Azithromycin. The product can be used as reference standards and further traceability against pharmacopeial standards (USP or EP) can be provided based on feasibility. ChemWhat products are for analytical purpose only and not for human use.

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品牌

ChemWhat（凯望）—— 品牌介绍

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https://www.chemwhat.com/azithromycin-d5-cas-N/A/

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Azithromycin Aglycone CAS号 117693-42-2

基本信息

CAS(化学文摘登记)号

117693-42-2

英文名称

Azithromycin Aglycone

英文化学名

(2R,3S,4R,5R,8R,10R,11R,12S,13S,14R)-2-ethyl-3,4,10,11,13-pentahydroxy-3,5,6,8,10,12,14-heptamethyl-1-oxa-6-azacyclopentadecan-15-one

简化分子线性输入规范(SMILES)

CC[C@@H](OC([C@@H]([C@H]([C@@H]([C@H]1O)C)O)C)=O)[C@@](O)([C@@H]([C@H](N(C[C@@H](C[C@]1(O)C)C)C)C)O)C

分子式

C22H43NO7

分子量

433.6

物理性质

外观

安全信息

危险品运输编号

非危险品

德国水污染物质分类清单(WGK Germany)

3

详细规格

测试方法

核磁；质谱，液相色谱

保存条件

常温避光保存

产品描述

Azithromycin Aglycone is chemically (2R,3S,4R,5R,8R,10R,11R,12S,13S,14R)-2-ethyl-3,4,10,11,13-pentahydroxy-3,5,6,8,10,12,14-heptamethyl-1-oxa-6-azacyclopentadecan-15-one. Azithromycin Aglycone is supplied with detailed characterization data compliant with regulatory guideline. Azithromycin Aglycone can be used for the analytical method development, method validation (AMV), Quality Controlled (QC) application for Abbreviated New Drug Application (ANDA) or during commercial production of Azithromycin. The product can be used as reference standards and further traceability against pharmacopeial standards (USP or EP) can be provided based on feasibility. ChemWhat products are for analytical purpose only and not for human use.

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品牌

ChemWhat（凯望）—— 品牌介绍

ChemWhat官网链接地址

https://www.chemwhat.com/azithromycin-aglycone-cas-117693-42-2/

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Azithromycin-13C-d3 CAS号 N/A

基本信息

CAS(化学文摘登记)号

N/A

英文名称

Azithromycin-13C-d3

英文化学名

(2R,3S,4R,5R,8R,10R,11R,12S,13S,14R)-2-ethyl-3,4,10-trihydroxy-13-(((2R,4R,5S,6S)-5-hydroxy-4-methoxy-4,6-dimethyltetrahydro-2H-pyran-2-yl)oxy)-11-(((2S,3R,4S,6R)-3-hydroxy-6-methyl-4-(methyl(methyl-13C-d3)amino)tetrahydro-2H-pyran-2-yl)oxy)-3,5,6,8,10,12,14-heptamethyl-1-oxa-6-azacyclopentadecan-15-one

简化分子线性输入规范(SMILES)

C[C@@H]([C@@H]([C@H](C(O[C@@H]([C@@](C)(O)[C@@H]1O)CC)=O)C)O[C@@](O[C@@H](C)[C@@H]2O)([H])C[C@@]2(C)OC)[C@H]([C@](O)(C[C@H](CN([C@@H]1C)C)C)C)O[C@@](O[C@H](C)C[C@@H]3N(C)[13C]([2H])([2H])[2H])([H])[C@@H]3O

分子式

C3713CH69D3N2O12

分子量

753.0

物理性质

外观

安全信息

危险品运输编号

非危险品

德国水污染物质分类清单(WGK Germany)

3

详细规格

测试方法

核磁；质谱，液相色谱

保存条件

常温避光保存

产品描述

Azithromycin-13C-d3 is chemically (2R,3S,4R,5R,8R,10R,11R,12S,13S,14R)-2-ethyl-3,4,10-trihydroxy-13-(((2R,4R,5S,6S)-5-hydroxy-4-methoxy-4,6-dimethyltetrahydro-2H-pyran-2-yl)oxy)-11-(((2S,3R,4S,6R)-3-hydroxy-6-methyl-4-(methyl(methyl-13C-d3)amino)tetrahydro-2H-pyran-2-yl)oxy)-3,5,6,8,10,12,14-heptamethyl-1-oxa-6-azacyclopentadecan-15-one. Azithromycin-13C-d3 is supplied with detailed characterization data compliant with regulatory guideline. Azithromycin-13C-d3 can be used for the analytical method development, method validation (AMV), Quality Controlled (QC) application for Abbreviated New Drug Application (ANDA) or during commercial production of Azithromycin. The product can be used as reference standards and further traceability against pharmacopeial standards (USP or EP) can be provided based on feasibility. ChemWhat products are for analytical purpose only and not for human use.

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ChemWhat（凯望）—— 品牌介绍

ChemWhat官网链接地址

https://www.chemwhat.com/azithromycin-13c-d3-cas-N/A/

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3-Hydroxy Azithromycinoic Acid CAS号 2365312-76-9

基本信息

CAS(化学文摘登记)号

2365312-76-9

英文名称

3-Hydroxy Azithromycinoic Acid

英文化学名

(2R,3S,4S,5R,6R,8R)-5-(((2S,3R,4S,6R)-4-(Dimethylamino)-3-hydroxy-6-methyltetrahydro-2H-pyran-2-yl)oxy)-3,6-dihydroxy-2,4,6,8-tetramethyl-9-(methyl((2R,3R,4R,5R)-3,4,5-trihydroxy-4-methylheptan-2-yl)amino)nonanoic acid

简化分子线性输入规范(SMILES)

C[C@@H]([C@H](O)[C@@H](C)C(O)=O)[C@H]([C@](C)(O)C[C@@H](C)CN(C)[C@H](C)[C@@H](O)[C@](C)(O)[C@H](O)CC)O[C@H](O[C@@H]1C)[C@@H]([C@H](C1)N(C)C)O

分子式

C30H60N2O10

分子量

608.8

物理性质

外观

安全信息

危险品运输编号

非危险品

德国水污染物质分类清单(WGK Germany)

3

详细规格

测试方法

核磁；质谱，液相色谱

保存条件

常温避光保存

产品描述

3-Hydroxy Azithromycinoic Acid is chemically (2R,3S,4S,5R,6R,8R)-5-(((2S,3R,4S,6R)-4-(Dimethylamino)-3-hydroxy-6-methyltetrahydro-2H-pyran-2-yl)oxy)-3,6-dihydroxy-2,4,6,8-tetramethyl-9-(methyl((2R,3R,4R,5R)-3,4,5-trihydroxy-4-methylheptan-2-yl)amino)nonanoic acid. 3-Hydroxy Azithromycinoic Acid is supplied with detailed characterization data compliant with regulatory guideline. 3-Hydroxy Azithromycinoic Acid can be used for the analytical method development, method validation (AMV), Quality Controlled (QC) application for Abbreviated New Drug Application (ANDA) or during commercial production of Azithromycin. The product can be used as reference standards and further traceability against pharmacopeial standards (USP or EP) can be provided based on feasibility. ChemWhat products are for analytical purpose only and not for human use.

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N-Nitroso Azithromycin EP 杂质 M CAS号 N/A

基本信息

CAS(化学文摘登记)号

N/A

英文名称

N-Nitroso Azithromycin EP 杂质 M

英文化学名

N-((2S,3R,4S,6R)-2-(((2R,3S,4R,5R,8R,10R,11R,12S,13S,14R)-2-ethyl-3,4,10-trihydroxy-13-(((2R,4R,5S,6S)-5-hydroxy-4-methoxy-4,6-dimethyltetrahydro-2H-pyran-2-yl)oxy)-3,5,6,8,10,12,14-heptamethyl-15-oxo-1-oxa-6-azacyclopentadecan-11-yl)oxy)-3-hydroxy-6-methyltetrahydro-2H-pyran-4-yl)-N-nitrosoformamide

简化分子线性输入规范(SMILES)

CC[C@H]([C@]([C@@H]([C@@H](C)N(C)C[C@H](C)C[C@@](C)(O)[C@H](O[C@@H]1O[C@H](C)C[C@H](N(N=O)C=O)[C@H]1O)[C@@H](C)[C@H](O[C@H]2C[C@@](C)(OC)[C@@H](O)[C@H](C)O2)[C@H]3C)O)(O)C)OC3=O

分子式

C37H67N3O14

分子量

778.0

物理性质

外观

安全信息

危险品运输编号

非危险品

德国水污染物质分类清单(WGK Germany)

3

详细规格

测试方法

核磁；质谱，液相色谱

保存条件

常温避光保存

产品描述

N-Nitroso Azithromycin EP Impurity M is chemically N-((2S,3R,4S,6R)-2-(((2R,3S,4R,5R,8R,10R,11R,12S,13S,14R)-2-ethyl-3,4,10-trihydroxy-13-(((2R,4R,5S,6S)-5-hydroxy-4-methoxy-4,6-dimethyltetrahydro-2H-pyran-2-yl)oxy)-3,5,6,8,10,12,14-heptamethyl-15-oxo-1-oxa-6-azacyclopentadecan-11-yl)oxy)-3-hydroxy-6-methyltetrahydro-2H-pyran-4-yl)-N-nitrosoformamide. N-Nitroso Azithromycin EP Impurity M is supplied with detailed characterization data compliant with regulatory guideline. N-Nitroso Azithromycin EP Impurity M can be used for the analytical method development, method validation (AMV), Quality Controlled (QC) application for Abbreviated New Drug Application (ANDA) or during commercial production of Azithromycin. The product can be used as reference standards and further traceability against pharmacopeial standards (USP or EP) can be provided based on feasibility. ChemWhat products are for analytical purpose only and not for human use.

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ChemWhat（凯望）—— 品牌介绍

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https://www.chemwhat.com/n-nitroso-azithromycin-ep-impurity-m-cas-N/A/

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Azithromycin-d3 CAS号 163921-65-1

基本信息

CAS(化学文摘登记)号

163921-65-1

英文名称

Azithromycin-d3

英文化学名

(2R,3S,4R,5R,8R,10R,11R,12S,13S,14R)-11-(((2S,3R,4S,6R)-4-(dimethylamino)-3-hydroxy-6-methyltetrahydro-2H-pyran-2-yl)oxy)-2-ethyl-3,4,10-trihydroxy-13-(((2R,4R,5S,6S)-5-hydroxy-4-methoxy-4,6-dimethyltetrahydro-2H-pyran-2-yl)oxy)-3,5,8,10,12,14-hexamethyl-6-(methyl-d3)-1-oxa-6-azacyclopentadecan-15-one

简化分子线性输入规范(SMILES)

C[C@@H]([C@@H]([C@H](C(O[C@@H]([C@@](C)(O)[C@@H]1O)CC)=O)C)O[C@@](O[C@@H](C)[C@@H]2O)([H])C[C@@]2(C)OC)[C@H]([C@](O)(C[C@H](CN([C@@H]1C)C([2H])([2H])[2H])C)C)O[C@@](O[C@H](C)C[C@@H]3N(C)C)([H])[C@@H]3O

分子式

C38H69D3N2O12

分子量

752

物理性质

外观

安全信息

危险品运输编号

非危险品

德国水污染物质分类清单(WGK Germany)

3

详细规格

测试方法

核磁；质谱，液相色谱

保存条件

常温避光保存

产品描述

Azithromycin-d3 is chemically (2R,3S,4R,5R,8R,10R,11R,12S,13S,14R)-11-(((2S,3R,4S,6R)-4-(dimethylamino)-3-hydroxy-6-methyltetrahydro-2H-pyran-2-yl)oxy)-2-ethyl-3,4,10-trihydroxy-13-(((2R,4R,5S,6S)-5-hydroxy-4-methoxy-4,6-dimethyltetrahydro-2H-pyran-2-yl)oxy)-3,5,8,10,12,14-hexamethyl-6-(methyl-d3)-1-oxa-6-azacyclopentadecan-15-one. Azithromycin-d3 is supplied with detailed characterization data compliant with regulatory guideline. Azithromycin-d3 can be used for the analytical method development, method validation (AMV), Quality Controlled (QC) application for Abbreviated New Drug Application (ANDA) or during commercial production of Azithromycin. The product can be used as reference standards and further traceability against pharmacopeial standards (USP or EP) can be provided based on feasibility. ChemWhat products are for analytical purpose only and not for human use.

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ChemWhat（凯望）—— 品牌介绍

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https://www.chemwhat.com/azithromycin-d3-cas-163921-65-1/

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N-Nitroso Azithromycin EP 杂质 I CAS号 N/A

基本信息

CAS(化学文摘登记)号

N/A

英文名称

N-Nitroso Azithromycin EP 杂质 I

英文化学名

N-((2S,3R,4S,6R)-2-(((2R,3S,4R,5R,8R,10R,11R,12S,13S,14R)-2-ethyl-3,4,10-trihydroxy-13-(((2R,4R,5S,6S)-5-hydroxy-4-methoxy-4,6-dimethyltetrahydro-2H-pyran-2-yl)oxy)-3,5,6,8,10,12,14-heptamethyl-15-oxo-1-oxa-6-azacyclopentadecan-11-yl)oxy)-3-hydroxy-6-methyltetrahydro-2H-pyran-4-yl)-N-methylnitrous amide

简化分子线性输入规范(SMILES)

CC[C@H]([C@]([C@@H]([C@@H](C)N(C)C[C@H](C)C[C@@](C)(O)[C@H](O[C@@H]1O[C@H](C)C[C@H](N(N=O)C)[C@H]1O)[C@@H](C)[C@H](O[C@H]2C[C@@](C)(OC)[C@@H](O)[C@H](C)O2)[C@H]3C)O)(O)C)OC3=O

分子式

C37H69N3O13

分子量

764.0

物理性质

外观

安全信息

危险品运输编号

非危险品

德国水污染物质分类清单(WGK Germany)

3

详细规格

测试方法

核磁；质谱，液相色谱

保存条件

常温避光保存

产品描述

N-Nitroso Azithromycin EP Impurity I is chemically N-((2S,3R,4S,6R)-2-(((2R,3S,4R,5R,8R,10R,11R,12S,13S,14R)-2-ethyl-3,4,10-trihydroxy-13-(((2R,4R,5S,6S)-5-hydroxy-4-methoxy-4,6-dimethyltetrahydro-2H-pyran-2-yl)oxy)-3,5,6,8,10,12,14-heptamethyl-15-oxo-1-oxa-6-azacyclopentadecan-11-yl)oxy)-3-hydroxy-6-methyltetrahydro-2H-pyran-4-yl)-N-methylnitrous amide. It is also known as N-Nitroso Desmethyl Azithromycin. N-Nitroso Azithromycin EP Impurity I is supplied with detailed characterization data compliant with regulatory guideline. N-Nitroso Azithromycin EP Impurity I can be used for the analytical method development, method validation (AMV), Quality Controlled (QC) application for Abbreviated New Drug Application (ANDA) or during commercial production of Azithromycin. The product can be used as reference standards and further traceability against pharmacopeial standards (USP or EP) can be provided based on feasibility. ChemWhat products are for analytical purpose only and not for human use.

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Azithromycin CAS号 83905-01-5

基本信息

CAS(化学文摘登记)号

83905-01-5

英文名称

Azithromycin

英文化学名

(2R,3S,4R,5R,8R,10R,11R,12S,13S,14R)-13-[(2,6-Dideoxy-3-C-methyl-3-O-methyl-alpha-L-ribo-hexopyranosyl)oxy]-2-ethyl-3,4,10-trihydroxy-3,5,6,8,10,12,14-heptamethyl-11-[[3,4,6-trideoxy-3-(dimethylamino)-beta-D-xylo-hexopyranosyl]oxy]-1-oxa-6-azacyclopentadecan-15-one

简化分子线性输入规范(SMILES)

C[C@@H]([C@@H]([C@H](C(O[C@@H]([C@@](C)(O)[C@@H]1O)CC)=O)C)O[C@@](O[C@@H](C)[C@@H]2O)([H])C[C@@]2(C)OC)[C@H]([C@](O)(C[C@H](CN([C@@H]1C)C)C)C)O[C@@](O[C@H](C)C[C@@H]3N(C)C)([H])[C@@H]3O

分子式

C38H72N2O12

分子量

749

物理性质

外观

安全信息

危险品运输编号

非危险品

德国水污染物质分类清单(WGK Germany)

3

详细规格

测试方法

核磁；质谱，液相色谱

保存条件

常温避光保存

产品描述

Azithromycin is chemically (2R,3S,4R,5R,8R,10R,11R,12S,13S,14R)-13-[(2,6-Dideoxy-3-C-methyl-3-O-methyl-alpha-L-ribo-hexopyranosyl)oxy]-2-ethyl-3,4,10-trihydroxy-3,5,6,8,10,12,14-heptamethyl-11-[[3,4,6-trideoxy-3-(dimethylamino)-beta-D-xylo-hexopyranosyl]oxy]-1-oxa-6-azacyclopentadecan-15-one. Azithromycin is supplied with detailed characterization data compliant with regulatory guideline. Azithromycin can be used for the analytical method development, method validation (AMV), Quality Controlled (QC) application for Abbreviated New Drug Application (ANDA) or during commercial production of Azithromycin. The product can be used as reference standards and further traceability against pharmacopeial standards (USP or EP) can be provided based on feasibility. ChemWhat products are for analytical purpose only and not for human use.

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117772-70-0 (dihydrate) ; 121470-24-4 (hydrate) ; 90581-30-9 (盐酸盐)

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Azithromycin 杂质 7 CAS号 1914946-68-1

基本信息

CAS(化学文摘登记)号

1914946-68-1

英文名称

Azithromycin 杂质 7

英文化学名

(2R,3S,4R,5R,8R,10R,11R,12R,13S,14R)-2-ethyl-3,4,10,11-tetrahydroxy-13-(((2R,4R,5S,6S)-5-hydroxy-4-methoxy-4,6-dimethyltetrahydro-2H-pyran-2-yl)oxy)-3,5,6,8,10,12,14-heptamethyl-1-oxa-6-azacyclopentadecan-15-one

简化分子线性输入规范(SMILES)

C[C@@H](C(O[C@@H]([C@@](O)([C@@H]1O)C)CC)=O)[C@H]([C@@H]([C@H]([C@](O)(C[C@H](CN(C)[C@@H]1C)C)C)O)C)O[C@@](O[C@@H](C)[C@@H]2O)([H])C[C@@]2(C)OC

分子式

C30H57NO10

分子量

591.8

物理性质

外观

安全信息

危险品运输编号

非危险品

德国水污染物质分类清单(WGK Germany)

3

详细规格

测试方法

核磁；质谱，液相色谱

保存条件

常温避光保存

产品描述

Azithromycin Impurity 7 is chemically (2R,3S,4R,5R,8R,10R,11R,12R,13S,14R)-2-ethyl-3,4,10,11-tetrahydroxy-13-(((2R,4R,5S,6S)-5-hydroxy-4-methoxy-4,6-dimethyltetrahydro-2H-pyran-2-yl)oxy)-3,5,6,8,10,12,14-heptamethyl-1-oxa-6-azacyclopentadecan-15-one. Azithromycin Impurity 7 is supplied with detailed characterization data compliant with regulatory guideline. Azithromycin Impurity 7 can be used for the analytical method development, method validation (AMV), Quality Controlled (QC) application for Abbreviated New Drug Application (ANDA) or during commercial production of Azithromycin. The product can be used as reference standards and further traceability against pharmacopeial standards (USP or EP) can be provided based on feasibility. ChemWhat products are for analytical purpose only and not for human use.

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邮箱：chemwhat@watson-int.cn

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https://www.chemwhat.com/azithromycin-impurity-7-cas-1914946-68-1/

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N-Nitroso Azithromycin EP 杂质 A CAS号 N/A

基本信息

CAS(化学文摘登记)号

N/A

英文名称

N-Nitroso Azithromycin EP 杂质 A

英文化学名

(2R,3S,4R,5R,8R,10R,11R,12S,13S,14R)-11-(((2S,3R,4S,6R)-4-(dimethylamino)-3-hydroxy-6-methyltetrahydro-2H-pyran-2-yl)oxy)-2-ethyl-3,4,10-trihydroxy-13-(((2R,4R,5S,6S)-5-hydroxy-4-methoxy-4,6-dimethyltetrahydro-2H-pyran-2-yl)oxy)-3,5,8,10,12,14-hexamethyl-6-nitroso-1-oxa-6-azacyclopentadecan-15-one

简化分子线性输入规范(SMILES)

C[C@@H]([C@@H]([C@H](C(O[C@@H]([C@@](C)(O)[C@@H]1O)CC)=O)C)O[C@@](O[C@@H](C)[C@@H]2O)([H])C[C@@]2(C)OC)[C@H]([C@](O)(C[C@H](CN(N=O)[C@@H]1C)C)C)O[C@@](O[C@H](C)C[C@@H]3N(C)C)([H])[C@@H]3O

分子式

C37H69N3O13

分子量

764

物理性质

外观

安全信息

危险品运输编号

非危险品

德国水污染物质分类清单(WGK Germany)

3

详细规格

测试方法

核磁；质谱，液相色谱

保存条件

常温避光保存

产品描述

N-Nitroso Azithromycin EP Impurity A is chemically (2R,3S,4R,5R,8R,10R,11R,12S,13S,14R)-11-(((2S,3R,4S,6R)-4-(dimethylamino)-3-hydroxy-6-methyltetrahydro-2H-pyran-2-yl)oxy)-2-ethyl-3,4,10-trihydroxy-13-(((2R,4R,5S,6S)-5-hydroxy-4-methoxy-4,6-dimethyltetrahydro-2H-pyran-2-yl)oxy)-3,5,8,10,12,14-hexamethyl-6-nitroso-1-oxa-6-azacyclopentadecan-15-one. It is also known as N-Nitroso Azaerythromycin A ; N-Nitroso N-Desmethyl Azithromycin. N-Nitroso Azithromycin EP Impurity A is supplied with detailed characterization data compliant with regulatory guideline. N-Nitroso Azithromycin EP Impurity A can be used for the analytical method development, method validation (AMV), Quality Controlled (QC) application for Abbreviated New Drug Application (ANDA) or during commercial production of Azithromycin. The product can be used as reference standards and further traceability against pharmacopeial standards (USP or EP) can be provided based on feasibility. ChemWhat products are for analytical purpose only and not for human use.

快速询价

邮箱：chemwhat@watson-int.cn

品牌

ChemWhat（凯望）—— 品牌介绍

ChemWhat官网链接地址

https://www.chemwhat.com/n-nitroso-azithromycin-ep-impurity-a-cas-N/A/

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