Atropisomeric bi(9,10-dihydro)phenanthrene and phenanthrene/bibenzyl dimers with cytotoxic activity from the pseudobulbs of Pleione bulbocodioides.

Atropisomeric bi(9,10-dihydro)phenanthrene and phenanthrene/bibenzyl dimers with cytotoxic activity from the pseudobulbs of Pleione bulbocodioides. Fitoterapia. 2019 Aug 14;:104313 Authors: Wang C, Shao SY, Han SW, Li S Abstract Bulbocodioidins E-H (1-4), four pairs of undescribed racemic bi(9,10-dihydro)phenanthrene and phenanthrene/bibenzyl atropisomers, along with four known compounds (5-8) were isolated from the ethanol extract of the pseudobulbs of Pleione bulbocodioides. Their structures were established by HRESIMS and comprehensive NMR spectroscopic data analysis. Their absolute configurations were elucidated by comparison of their experimental and calculated ECD (electronic circular dichroism) curves. Furthermore, compound 4a displayed cytotoxic activity against colon cancer (HCT-116), liver cancer (HepG2), and breast cancer (MCF-7) cell lines with IC50 values of 7.6, 3.8 and 3.4 μM, respectively. Compound 6 showed cytotoxic activity against breast cancer cell line (MCF-7) with IC50 value of 5.4 μM. PMID: 31421147 [PubMed - as supplied by publisher]
Source: Fitoterapia - Category: Biochemistry Authors: Tags: Fitoterapia Source Type: research