Colensenone

(3R)-1,2,3,4a,5,6,6aα,9,9a,9bα-Decahydro-3β,4aβ,7,7,9aβ-pentamethyl-3-vinylcyclopenta[f][1]benzopyran-8(7H)-one

(3R)-3α-Ethenyl-2,3,4a,5,6,6aα,7,9,9a,9bα-decahydro-3,4aβ,7,7,9aβ-pentamethylcyclopenta[f][1]benzopyran-8(1H)-one