作者:Johannes Siwon、Robert Verpoorte、Teris van Beek、Hans Meerburg、Anders Baerheim Svendsen
DOI:10.1016/0031-9422(81)85116-3
日期:1981.1
Abstract From the root and stem of Pycnarrhena longifolia the following alkaloids were isolated and identified: obaberine, homoaromoline, aromoline, daphnoline, limacine, krukovine, magnoflorine and pycnarrhine. Pycnarrhine is a simple isoquinoline derivative which has not previously been reported as a natural product.
The cleavage of methyl ethers of several bisbenzylisoquinoline alkaloids was studied and regioselective O-demethylation was observed.
STADLER, RICHARD;LOEFFLER, SUSANNE;CASSELS, BRUCE K.;ZENK, MEINHART H., PHYTOCHEMISTRY, 27,(1988) N 8, C. 2557-2565
作者:STADLER, RICHARD、LOEFFLER, SUSANNE、CASSELS, BRUCE K.、ZENK, MEINHART H.
DOI:——
日期:——
Bisbenzyltetrahydroisoquinolines, a New Class of Inhibitors of the Mitochondrial Respiratory Chain Complex I
作者:Granell, Susana、Andreu, Inmaculada、Marti, Daniel、Cave, Adrien、Aragon, Raul、Estornell, Ernesto、Cortes, Diego、Zafra-Polo, M. Carmen
DOI:10.1055/s-2004-818921
日期:2004.3
Four bisbenzyltetrahydroisoquinoline alkaloids (-)-medelline, (+)-antioquine, (+)-aromoline, and (+)-obamegine were isolated from the fruits of Xylopia columbiana. These compounds, the previously isolated alkaloids (+)-thaligrisine and (+)-isotetrandrine, as well as their O-acetylated derivatives were assayed on submitochondrial particles from beef heart as inhibitors of the mammalian respiratory chain. The results revealed that these alkaloids act as selective inhibitors of mitochondrial complex I in a 0.15 - 4.71 μM range. O-Acetylation, which increases their lipophilicity, considerably increased the inhibitory potency.