tert-Butyl-dimethyl-((5aS,9aR)-3,5a,9,9-tetramethyl-9a-vinyl-4,5,5a,6,7,8,9,9a-octahydro-benzo[b]oxepin-2-yloxy)-silane

2,3,4,4a,5,6-hexahydro-1,1,4a,7-tetramethyl-1H-benzocycloheptene