(2aR,2a1R,3R,5aR,8aR)-3-methoxy-2a1,6,6-trimethyl-2a,2a1,3,5a,6,7,8,8a-octahydro-2H-naphtho[1,8-bc]furan-2-one

(2aS,2a1S,3R,4R,5R,5aS,8aS)-4,5-dihydroxy-3-methoxy-2a1,6,6-trimethyldecahydro-2H-naphtho[1,8-bc]furan-2-one