Caspofungin Impurity 5

Chemical Name: (2R,4R)-N-((2S,3R)-1-((2S,4R)-2-(((2S,3S,4S)-1-(((2S,3R)-5-amino-1-((2S,3S)-2-carbamoyl-3-hydroxypyrrolidin-1-yl)-3-hydroxy-1-oxopentan-2-yl)amino)-3,4-dihydroxy-4-(4-hydroxyphenyl)-1-oxobutan-2-yl)carbamoyl)-4-hydroxypyrrolidin-1-yl)-3-hydroxy-1-oxobutan-2-yl)-1-((10R,12S)-10,12-dimethyltetradecanoyl)-4,5-dihydroxypyrrolidine-2-carboxamide

Synonym: 2,3-Anhydro Atorvastatin Acid Ethyl Ester