(Z)-4-[(2R,3S,3aS,5aS,6R,7R,8aR,8bR)-2-[(E)-2-(2,2-dimethyl-6-oxo-1,3-dioxin-4-yl)ethenyl]-6-ethyl-7-methyl-1,2,3,3a,5a,6,7,8,8a,8b-decahydro-as-indacen-3-yl]but-2-enoic acid 、
acetic acid;methyl (2S)-5-amino-2-[(2,4-dimethoxyphenyl)methyl-prop-2-enoxycarbonylamino]pentanoate 以60%的产率得到