7,10-二甲氧基-10-Dab  Iii

(2Ar,4S,4As,6R,9S,11S,12S,12Ar,12Bs)-12B-(Acetyloxy)-12-(Benzoyloxy)-1,2A,3,4,4A,6,9,10,11,12,12A,12B-Dodecahydro-9,11-Dihydroxy-4,6-Dimethoxy-4A,8,13,13-Tetramethyl-7,11-Methano-5H-Cyclodeca[3,4]Benz[1,2-B]Oxet-5-One