甲醛

(3S,3aR,4R,4aS,8aR,9aS)-decahydro-3-methyl-4-[2-(E)-[(2R,6S)-6-methylpiperidin-2-yl]ethenyl]naphtho[2,3-c]furan-1(3H)-one

1,1-dimethyl<(2R,6S)-2-formyl-6-methyl-1-piperidine>carboxylate

(S)-(+)-N-(叔丁氧羰基)-2-甲基哌啶

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