(1aα,4aβ,8aβ)-2,4a,5,6,7,8-hexahydro-3,4-bis(hydroxymethyl)-4a,8,8-trimethyl-1aH-naphth<8a,1-b>oxirane

(5α,5aα,9aβ)-4,5,5a,6,7,8,9,9a-octahydro-6,6,9a-trimethyl-5,5a-epoxynaphtho<1,2-c>-furan

(1aα,4aβ,8aα)-2,4a,5,6,7,8-hexahydro-3,4-bis(methoxycarbonyl)-4a,8,8a-trimethyl-1aH-naphth<8a,1-b>oxirane

(5α,5aα,9aβ)-4,5,5a,6,7,8,9,9a-octahydro-5-hydroxy-6,6,9a-trimethylnaphtho<1,2-c>furan

4,6,7,8,9,9a-hexahydro-6,6,9a-trimethylnaphtho<1,2-c>-furan