5-甲氧基色胺 、 secologanin 在
顺丁烯二酸 作用下,
生成 methyl (2S,3R,4S)-4-(((R)-6-methoxy-2,3,4,9-tetrahydro-1H-pyrido[3,4-b]indol-1-yl)methyl)-2-(((2S,3R,4S,5S,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)tetrahydro-2H-pyran-2-yl)oxy)-3-vinyl-3,4-dihydro-2H-pyran-5-carboxylate 、
methyl (2S,3R,4S)-3-ethenyl-4-[[(1S)-6-methoxy-2,3,4,9-tetrahydro-1H-pyrido[3,4-b]indol-1-yl]methyl]-2-[(2S,3R,4S,5S,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxy-3,4-dihydro-2H-pyran-5-carboxylate