Acetic acid (1R,4S,6R,7R,8R,9S,10S,11S)-10-acetoxy-11-hydroxy-6-methoxy-11-methyl-3-oxo-8-(2,2,2-trichloro-acetylamino)-2,5-dioxa-tricyclo[5.4.0.04,8]undec-9-yl ester

Acetic acid (1R,4S,5R,6S,7S,8S,9S)-4,7-diacetoxy-9-((S)-2,2-dimethyl-[1,3]dioxolan-4-yl)-8-hydroxy-8-methyl-3-oxo-5-(2,2,2-trichloro-acetylamino)-2-oxa-bicyclo[3.3.1]non-6-yl ester