ChemInform Abstract: Two New Flavonoids from Derris eriocarpa How.

Lou, Hua‐Yong; Wu, Hong-Guo; Tan, Yinling; Lan, Junjie; Ma, Xiao‐Pan; Liang, Guangyi; Yi, Ping; Pan, Weidong

doi:10.1002/chin.201636188

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“…Each optimized structure was used for the TDDFT calculation at the same theoretic level and solvation model to generate a set of excitation energy and the corresponding rotational strength, which were then plotted by using a Gaussian function to generate the theoretically calculated ECD spectra. [ ] In the 200 – 400 nm region, the theoretically calculated ECD spectrum of 1 was in good agreement with the experimental ECD ( Figure ), which supported the assignment of the absolute configuration for 1 .…”

Section: Methodssupporting

confidence: 76%

Novel Flavones from the Root of Phytolacca acinosa Roxb.

Zhang

et al. 2017

Chemistry & Biodiversity

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Two new flavones, 6,7-methylenedioxy-4-hydroxypeltogynan-7'-one (1), cochliophilin B (2), as well as two known ones, cochliophilin A (3) and 6-methoxy-7-hydroxy flavone (4), were isolated from the ethanol extract of the root of Phytolacca acinosa Roxb. Compound 1 is a flavanol framework with one δ-lactone unit, which is rather rare in nature. The structures of the new compounds were determined on the basis of extensive spectroscopic (IR, MS, 1D- and 2D-NMR) analyses, the absolute configuration of 1 was established by comparing experimental and calculated electronic circular dichroism spectra. The structures of known compounds were fixed by comparison with literatures data. Compounds 2 and 4 showed modest inhibitory activities against BEL-7402 cell line, with IC values of 28.22 and 39.16 μmol/L, respectively.

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Section: Methodssupporting

confidence: 76%