Acetic acid (2R,3S,4S,5R)-4,5-bis-(tert-butyl-dimethyl-silanyloxy)-2-((Z)-(1R,4S,5R,9R,11S,12S)-11-hydroxy-5-isopropyl-1-methoxy-8,12-dimethyl-15-oxa-tricyclo[10.2.1.04,9]pentadeca-2,7,13-trien-2-ylmethoxy)-tetrahydro-pyran-3-yl ester

Acetic acid (2S,3S,4S,5R)-4,5-bis-(tert-butyl-dimethyl-silanyloxy)-2-((Z)-(1R,4S,5R,9R,11S,12S)-11-hydroxy-5-isopropyl-1-methoxy-8,12-dimethyl-15-oxa-tricyclo[10.2.1.04,9]pentadeca-2,7,13-trien-2-ylmethoxy)-tetrahydro-pyran-3-yl ester