Caspofungin Impurity 1

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