(10E,4S,5S,7R,13R)-13-hydroxy-4,5-isopropylidenedioxy-7-methyl-9-oxo-8-oxa-10-tetradecenoic acid

2-(p-tolylsulfonyl)ethyl (10E,4S,5S,7R,13R)-13-t-butyldimethylsiloxy-4,5-isopropylidenedioxy-7-methyl-9-oxo-8-oxa-10-tetradecenoate