(4aS,5aR,10aS,12aR)-9,9-Dimethyl-3,4,4a,5a,8,9,10a,11,12,12a-decahydro-2H-1,5,10-trioxa-9-silabenzo[b]heptalene

(4aS,6R,7S,9aR)-Allyldimethyl-(6-vinyloctahydro-1,5-dioxabenzocyclohepten-7-yloxy)silane