Acetic acid (E)-(R)-3-[(1R,4S,6S)-4-(tert-butyl-dimethyl-silanyloxy)-2,2,6-trimethyl-7-oxa-bicyclo[4.1.0]hept-1-yl]-1-methyl-allyl ester

Acetic acid (E)-(R)-3-[(1S,4S,6R)-4-(tert-butyl-dimethyl-silanyloxy)-2,2,6-trimethyl-7-oxa-bicyclo[4.1.0]hept-1-yl]-1-methyl-allyl ester

2,2-Dimethyl-propionic acid (2R,3R,4S,5R,6R)-2-[(1R,3S,6R)-6-((R)-3-acetoxy-but-1-ynyl)-1,5,5-trimethyl-7-oxa-bicyclo[4.1.0]hept-3-yloxy]-4,5-bis-(2,2-dimethyl-propionyloxy)-6-(2,2-dimethyl-propionyloxymethyl)-tetrahydro-pyran-3-yl ester