Two new sesquiterpene evoninate alkaloids, were isolated together with the known compounds syringaresinol and 4'-O-methyl-(-)-epigallocatechin from the root bark of Maytenus aquifolium. The structures of the two alkaloids ...

Alkaloids are a subgroup of natural nitrogenous compounds. The term “alkaloid” have many definitions because, it refers to compounds with very heterogeneous structures, however, alkaloid is a basic substance containing one ...

Two new sesquiterpene evoninate alkaloids, aquifoliunine E-III and aquifoliunine E-IV, were isolated from the root bark of Maytenus aquifolium. The structures of the new compounds were elucidated on the basis of spectroscopic ...

Two new sesquiterpene evoninate alkaloids, aquifoliunine E-III and aquifoliunine E-IV, were isolated from the root bark of Maytenus aquifolium. The structures of the new compounds were elucidated on the basis of spectroscopic ...

The phytochemical investigation of the methanol crude extract obtained from Acosmium dasycarpum(Vog.) Yakovlev root bark led to the isolation of the quinolizidine alkaloids lupanine, acosmine, acosminine and lupanacosmine, ...

Prenyl indole alkaloids constitute a diverse class of natural products with complex chemical structures and potent biological activities. Investigation of the growth medium EtOAc extract produced by the endophytic fungus ...

This paper reports the separation of the indole alkaloids from the benzene extract of the root barks of Tabernaemontana hilariana (Apocynaceae). The crude alkaloid fraction was fractionated by droplet counter-current ...