Caespitenone

(1aS,8aS)-1aβ,4,7,7-Tetramethyl-5,6,7,8-tetrahydro-4α,5α-methano-1aH-azuleno[1,8a-b]oxiren-2(4H)-one

(1aS)-4aα,5α-Epoxy-1aβ,2,3,4,4a,7b-hexahydro-3,3,5,7bβ-tetramethyl-1H-cyclopropa[e]azulene-6(5H)-one