TL;DR: In this paper, evidence is presented in support of the stereostructures 4 and 5 for cimicine and cimimicidine, respectively, for 10-oxo derivatives.
Abstract: Evidence is presented in support of the stereostructures 4 and 5 for cimicine and cimicidine, respectively. Alkaloids 4 and 5, as well as the lactonic bases aspidophytine (23) and haplophytine (1), are converted by alkaline hydrogen peroxide to the corresponding 10-oxo derivatives.
TL;DR: CIMiciduphytine, a new dimeric indole alkaloid from Haplophyton cimicidum (Apocynaceae) has been assigned the aspidosperma-canthinone bisindole structure.
Abstract: Cimiciduphytine, a new dimeric indole alkaloid from Haplophyton cimicidum (Apocynaceae) has been assigned the aspidosperma-canthinone bisindole structure