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

(2R,6S)-tert-butyl 2-[2-(E)-[(1S,3S,3aR,4R,4aS,8aR,9aS)-3-ethyl-dodecahydro-1-methoxynaphtho[2,3-c]furan-4-yl]ethenyl]-6-methylpiperidine-1-carboxylate

(3aS,4S,6aS)-4-Ethyl-3-methyl-3-phenylselanyl-dihydro-furo[3,4-b]furan-2,6-dione