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  • Title: Three new biflavonoids from Chinese dragon's blood, Dracaena cochinchinensis.
    Author: Guan J, Guo SX.
    Journal: Nat Prod Commun; 2012 May; 7(5):591-4. PubMed ID: 22799082.
    Abstract:
    Three new biflavonoids, named (2RyS)-3'-methoxy-8-methylsocotrin-4'-ol (1), (2SyR)-3'-methoxy-8-methylsocotrin-4'-ol (2), and (2RyR)-8-methylsocotrin-4'-ol (3), were isolated from Chinese Dragon's blood [Dracaena cochinchinensis (Lour.) S. C. Chen], together with two known ones. The structures of these new biflavonoids were elucidated by a combination of HR-ESI-MS, 1H NMR, 13C NMR, HMQC, and HMBC spectra. The absolute configurations of compounds 1-4 were determined by quantum chemical calculation of the circular dichroism spectrum and comparison with the experimental CD spectrum.
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