5 rezultatus
Four new trijugin-type limonoids, cipatrijugins A-D (1-4), together with the known cipadesin A (5), were isolated from the leaves of Cipadessa cinerascens, and their structures were elucidated on the basis of spectroscopic and computational methods. The ability of compounds 1-5 to inhibit the growth
Twelve previously undescribed mexicanolide-type limonoids, including two pairs of isomers, together with seven known analogues were isolated from the twigs and leaves of Cipadessa baccifera. Their structures were determined by extensive spectroscopic methods and electronic circular dichroism (ECD)
Six new methyl angolensate type (1-6) and three new mexicanolide-type (7-9) limonoids, along with six known limonoids (10-15), were isolated from the seeds of Cipadessa baccifera. The structures of all these compounds were established by extensive 1D, 2D NMR, and HRESIMS experiments, and structures
A chemical investigation of the 80% ethanol extract of the seeds of Cipadessa baccifera (Roth.) Miq. led to the isolation of five new pregnane steroids, 17α,18,20S-trihydroxy-pregn-4-en-3,16-dione (1), 18-hydoxy-pregn-4,17(20)-trans-dien-3,16-dione (2),
A comprehensive reinvestigation of chemical constituents from CHCl3-soluble extract of Cipadessa baccifera led to the isolation of two new limonoids 1, 2 together with six known compounds 3-8. Their structures were established on the basis of extensive analysis of spectroscopic (IR, MS, 2D NMR)