(7S,9R,11aS)-2,4,7,9-Tetramethyl-8,9-dihydro-7H,11aH-6,10-dioxa-cycloheptacycloocten-11-one

(2R,4S,6r,7S,12R)-12-(((tert-butyldimethylsilyl)oxy)methyl)-2,4,8,10-tetramethyl-1,5-dioxaspiro[5.6]dodeca-8,10-dien-7-yl acetate

(2R,4S,6r,7S,12R)-12-(((tert-butyldimethylsilyl)oxy)methyl)-2,4,8,10-tetramethyl-1,5-dioxaspiro[5.6]dodeca-8,10-dien-7-ol