(E)-(3S,10R,16S)-10-(3-Chloro-4-methoxy-benzyl)-3-isobutyl-16-[(S)-1-((4R,5R)-2-methoxy-5-phenyl-[1,3]dioxolan-4-yl)-ethyl]-6,6-dimethyl-1,4-dioxa-8,11-diaza-cyclohexadec-13-ene-2,5,9,12-tetraone

2-(3-tert-butoxycarbonylamino-2,2-dimethyl-propionyloxy)-4-methyl-pentanoic acid 4-[2-(3-chloro-4-methoxy-phenyl)-1-(2,2,2-trichloro-ethoxycarbonyl)-ethylcarbamoyl]-1-(2,3-dihydroxy-1-methyl-3-phenyl-propyl)-but-3-enyl ester