(1S,3S,3aS,4R,4aS,8aR,9aS)-3-ethyl-dodecahydro-1-methoxynaphtho[2,3-c]furan-4-ol

(1S,3S,3aS,4aS,8aR,9aS)-3-ethyl-dodecahydro-1-methoxy-4-methylenenaphtho[2,3-c]furan