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Two new monoterpenoid indole alkaloids from the leaves and twigs of Ochrosia borbonica
- Yin, Zhao, Liu, Ting, Fu, Jin-Xiao
- Journal of Asian natural products research 2019 v.21 no.3 pp. 257-261
- Ochrosia, X-ray diffraction, branches, indole alkaloids, leaves, monoterpenoids, spectroscopy
- Two new monoterpenoid indole alkaloids, ochrobonines A (1) and B (2), together with five known compounds (3–7), were isolated from the leaves and twigs of Ochrosia borbonica. Their structures were determined by spectroscopic method, and the absolute configuration of compound 3 was first established by single-crystal X-ray diffraction. Compounds 1 and 2 represent a rare class of monoterpenoid indole alkaloids that with a 2-[1-(3-ethylpiperidin-4-yl)vinyl]-3-methyl-1H-indole skeleton.