✍ Scribed by G. Subramaniam; Toh-Seok Kam
No coin nor oath required. For personal study only.
Five new indole alkaloids, viz., kopsiloscine G (2), kopsidarine (4), kopsimaline F (6), kopsidine C N‐oxide (7), and aspidophylline B (9), in addition to 17 other known alkaloids, were obtained from the leaf and stem‐bark extract of the Malaysian Kopsia singapurensis. The structures were determined by using NMR and MS analysis. The results are compared with the alkaloidal composition of another sample of K. singapurensis, collected from the same location but at a different time of the year, as well as with other samples of K. singapurensis collected from different locations.
📜 SIMILAR VOLUMES
## Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable v
## Abstract Three new indole alkaloids, 11,12‐de(methylenedioxy)danuphylline (**1**), methyl (2__β__,11__β__,12__β__,19__α__)‐6,7‐didehydro‐8,21‐dioxo‐11,21‐cycloaspidospermidine‐2‐carboxylate (**2**), and (2__β__,5__β__)‐aspidofractinin‐16‐ol (**3**) were isolated from __Kopsia officinalis__, toge