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

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

(2R,6S)-2-[2-Benzenesulfonyl-1-benzoyloxy-2-((1S,3S,3aS,4R,4aS,8aR,9aS)-3-ethyl-1-methoxy-dodecahydro-naphtho[2,3-c]furan-4-yl)-ethyl]-6-methyl-piperidine-1-carboxylic acid tert-butyl ester

(3S,3aR,4S,9R,9aR)-4,9-epoxy-3-ethyl-3a,4,5,6,7,8,9,9a-octahydronaphtho[2,3-c]furan-1(3H)-one

2(5H)-Furanone, 5-ethyl-, (5S)-

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

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

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

(3S,3aS,4R,4aS,8aS)-3-ethyl-4-hydroxy-3a,4,4a,5,6,7,8,8a-octahydronaphtho[2,3-c]furan-1(3H)-one

Methanesulfonic acid (1S,3S,3aR,4R,4aS,8aR,9aS)-3-ethyl-1-methoxy-dodecahydro-naphtho[2,3-c]furan-4-ylmethyl ester

(3S,3aR,4R,4aS,8aR,9S,9aR)-4,9-epoxy-3-ethyl-decahydronaphtho[2,3-c]furan-1(3H)-one

(3S,3aS,4R,4aS,8aR,9aS)-decahydro-4-hydroxy-3-ethylnaphtho[2,3-c]furan-1(3H)-one

(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