从思茅山橙 Melodinus henryi Craib 的根和果中分得8个吲哚生物碱。根据理化性质和光谱分析,分别鉴定为它勃水甘草宁(tabersonine)(1),11-甲氧基它勃水甘草宁(11-methoxy-tabersonine)(2),洛柯日宁(lochnerinine)(3),Δ~(14)-长春曼胺(Δ~(14)-vincamine)(4),16-表-Δ~(14)-长春曼胺(16-epi-Δ~(14)-vincaminc)(5),Δ~(14)-埃那胺(Δ~(14)-eburnamine)(6),19,20-二氢-康狄卡品(19,20-dihydro-condylocapine)(h)和双吲哚生物碱 tenuicausine(8)。 Eight indole alkaloids were obtained from the roots and fruits of Melodinus henryi Craib. According to physicochemical properties and spectral analysis, they were identified as tabersonine (1), 11-methoxy-tabersonine (2), and lochnerinine. (3), Δ~(14)-vinmaneamine (Δ~(14)-vincamine) (4), 16-epi-Δ~(14)-vinmaneamine (16-epi-Δ~(14)- Vincaminc) (5), Δ~(14)-ennamin (Δ~(14)-eburnamine) (6), 19,20-dihydro-condylocapine (h, ) and the biguaneal alkaloid tenuicausine (8).