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JOURNAL ARTICLE
RESEARCH SUPPORT, NON-U.S. GOV'T
Rupestrines A-D, alkaloids from the aerial parts of Corydalis rupestris.
Bioorganic Chemistry 2018 April
Phytochemical investigation of the dichloromethane extract of the dried aerial parts of Corydalis rupestris (Papaveraceae) resulted in the identification of four new isoquinoline alkaloids rupestrines A-D and one known isoquinoline alkaloid, namely, stylopine. The structures of these compounds were characterized by extensive spectroscopic methods including 1D- (1 H and 13 C) and 2D NMR experiments (COSY, HSQC, HMBC, and NOESY) as well as HRESIMS analyses. In addition, the absolute configurations of rupestrines A-D were determined using modified Mosher's method. Cytotoxic effects of alkaloids and their interaction with albumin were also investigated in this study.
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