A. Ikuta et al., A NEW INDOLOPYRIDOQUINAZOLINE-TYPE ALKALOID FROM PHELLODENDRON AMURENSE CALLUS TISSUES, Journal of natural products, 61(8), 1998, pp. 1012-1014
Callus tissue from the stems of Phellodendron amurense (Rutaceae) prod
uced a new indolopyridoquinazoline-type alkaloid, 7, 8-dihydroxyrutaec
arpine (2), together with known 7-hydroxyrutaecarpine (1). Their struc
tures were established using spectroscopic methods.