Synonyms: Cyclo[(2R)-2-methyl-b-alanyl-(2S)-2-hydroxy-4-methylpentanoyl-(2E,5S,6S)-5-hydroxy-6-[(2R,3R)-3-phenyloxiranyl]-2-heptenoyl-3-chloro-O-methyl-D-tyrosyl](9CI); b-Alanine,N-[3-chloro-N-[5-[(2-hydroxy-4-methyl-1-oxopentyl)oxy]-1-oxo-6-(3-phenyloxiranyl)-2-heptenyl]-O-methyl-D-tyrosyl]-2-methyl-,x-lactone, [2R-[2a[1(R*),2E,5S*(S*),6S*],3b]]-; Cryptophycin; Cryptophycin1; Cryptophycin A