(2R,6R)-6-((1E,3Z,5R,7E,9E,11R,12S,13R,14R,15S)-14-((tert-butyldimethylsilyl)oxy)-3-ethyl-12-hydroxy-5,9,11,13,15-pentamethylheptadeca-1,3,7,9-tetraen-1-yl)-5,6-dihydro-2H-pyran-2-ol

(2R,6R)-2-((1'E,3'Z,5'R,7'E,9'E,11'R,12'S,13'S,14'R,15'S)-14'-(tert-butyldimethylsilyloxy)-3'-ethyl-5',9',11',13',15'-pentamethyl-12'-trimethylsilyloxy-heptadeca-1',3',7',9'-tetraen-1'-yl)-6-isopropoxy-3,6-dihydro-2H-pyran