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深圳远扬化学可提供阿法替尼申报所用全套杂质， 随货附CoA证书，HNMR，MS，HPLC图谱，纯度符合申报要求，西他沙星杂质为我司优势杂质，长期备有库存，发货快。如需西他沙星杂质相关详细信息，欢迎我司业务人员获取。

西他沙星（sitafloxacin hydrate）化学名为7-[(7S)-7- 氨基-5-氮杂螺[2.4]庚-5-基]-8- 氯-6- 氟-1-[(1R,2S)-cis-2-氟环丙基]-1,4-二氢-4-氧代-3-喹啉羧酸，是*制药三共株式会社（Daiichi Sankyo）开发的一广谱喹诺酮类抗菌药，临床用其一水合物，用于治疗严重难治性感染性疾病。

 除自主品牌杂质对照品外，我司还代理英国NIBSC标准品，美国剑桥CIL同位素标准品，美国NIST标准物质，欧洲标准局IRMM标准物质，加拿大TRC标准品，TLC标准品，MOLCAN标准品，NRC标准品等，欢迎洽谈。

Sitafloxacin

7-((S)-7-amino-5-azaspiro[2.4]heptan-5-yl)-8-chloro-6-fluoro-1-((1R,2S)-2-fluorocyclopropyl)-4-oxo-1,4-dihydroquinoline-3-carboxylic acid

Sitafloxacin Impurity 1

8-chloro-6,7-difluoro-1-((1S,2R)-2-fluorocyclopropyl)-4-oxo-1,4-dihydroquinoline-3-carboxylic acid

Sitafloxacin Impurity 2

8-chloro-6,7-difluoro-1-((1R,2R)-2-fluorocyclopropyl)-4-oxo-1,4-dihydroquinoline-3-carboxylic acid

Sitafloxacin Impurity 3

8-chloro-6,7-difluoro-1-((1S,2S)-2-fluorocyclopropyl)-4-oxo-1,4-dihydroquinoline-3-carboxylic acid

Sitafloxacin Impurity 4

7-((S)-7-amino-5-azaspiro[2.4]heptan-5-yl)-8-chloro-6-fluoro-1-((1S,2R)-2-fluorocyclopropyl)-4-oxo-1,4-dihydroquinoline-3-carboxylic acid

Sitafloxacin Impurity 5

7-((R)-7-amino-5-azaspiro[2.4]heptan-5-yl)-8-chloro-6-fluoro-1-((1S,2R)-2-fluorocyclopropyl)-4-oxo-1,4-dihydroquinoline-3-carboxylic acid

Sitafloxacin Impurity 6

7-((R)-7-amino-5-azaspiro[2.4]heptan-5-yl)-8-chloro-6-fluoro-1-((1R,2R)-2-fluorocyclopropyl)-4-oxo-1,4-dihydroquinoline-3-carboxylic acid

Sitafloxacin Impurity 7

7-((S)-7-amino-5-azaspiro[2.4]heptan-5-yl)-8-chloro-6-fluoro-1-((1S,2S)-2-fluorocyclopropyl)-4-oxo-1,4-dihydroquinoline-3-carboxylic acid

Sitafloxacin Impurity 8

7-((R)-7-amino-5-azaspiro[2.4]heptan-5-yl)-8-chloro-6-fluoro-1-((1S,2S)-2-fluorocyclopropyl)-4-oxo-1,4-dihydroquinoline-3-carboxylic acid

Sitafloxacin Impurity 9

7-((S)-7-amino-5-azaspiro[2.4]heptan-5-yl)-8-chloro-6-fluoro-1-((1R,2R)-2-fluorocyclopropyl)-4-oxo-1,4-dihydroquinoline-3-carboxylic acid

Sitafloxacin Impurity 10

7-((R)-7-amino-5-azaspiro[2.4]heptan-5-yl)-8-chloro-6-fluoro-1-((1R,2S)-2-fluorocyclopropyl)-4-oxo-1,4-dihydroquinoline-3-carboxylic acid

Sitafloxacin Impurity 11

7-(7-amino-5-azaspiro[2.4]heptan-5-yl)-6-fluoro-4-oxo-1,4-dihydroquinoline-3-carboxylic acid