(-)-Adenostylone

6β-Isobutyryloxy-9-oxoeuryopsin

4β-(Isobutyryloxy)-3,4aβ,5β-trimethyl-4,4a,5,6-tetrahydronaphtho[2,3-b]furan-9(7H)-one

(4S)-4,4a,5,6,7,9-Hexahydro-3,4aβ,5β-trimethyl-9-oxonaphtho[2,3-b]furan-4β-ol isobutyrate

(4S)-4a,5,6,7-Tetrahydro-3,4aβ,5β-trimethyl-4β-(2-methylpropanoyloxy)naphtho[2,3-b]furan-9(4H)-one

2-Methylpropanoic acid (4S)-4,4a,5,6,7,9-hexahydro-3,4aβ,5β-trimethyl-9-oxonaphtho[2,3-b]furan-4-yl ester