(4aS,6S,9aR)-((E)-6-Buta-1,3-dienyl)-3,4,4a,6,9,9a-hexahydro-2H-1,5-dioxa-benzocycloheptene

(E)-(4aS,6S,9aR)-1-(3,4,4a,6,9,9a-Hexahydro-2H-1,5-dioxa-benzocyclohepten-6-yl)-but-2-en-1-ol

(4aS,6S,7S,9aR)-6-[(E)-1-(tert-Butyl-dimethyl-silanyloxy)-but-2-enyl]-octahydro-1,5-dioxa-benzocyclohepten-7-ol