Two new bisbenzopyrans, namely 3,3′-bis(3,4-dihydro-4-hydroxy-6,8- dimethoxy-2H-1-benzopyran) (1), and 8′-methoxy-3,3′-bis (3,4-dihydro-4-hydroxy-6-methoxy-2H-1-benzopyran)(2), together with known 3,3′-bis(3,4-dihydro- 4-hydroxy-6-methoxy-2H-1-benzopyran) (3), as well as three known pyrido[1,2-α]azapine alkaloids, stemokerrin (4), oxystemokerrin (5) and oxystemokerrin-N-oxide (6), were isolated and identified from the roots of Stemona cochinchinensis. The structures of these compounds were elucidated by 1D- and 2D-NMR spectra and other spectroscopic studies.

Dien P.-H., Lin L.-G., Tang C.-P., Ke C.-Q., Ye Y.

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Từ khóa : 3,3 bis(3,4 dihydro 4 hydroxy 6,8 dimethoxy 2h 1 benzopyran); 8' methoxy 3,3 bis(3,4 dihydro 4 hydroxy 6 methoxy 2h 1 benzopyran); dibenzopyran derivative; herbaceous agent; oxystemokerrin; oxystemokerrin n oxide; plant extract; pyridol[1,2 alpha]azapine alkaloid derivative; stemokerrin; Stemona cochinchinensis extract; article; drug identification; drug isolation; drug structure; nuclear magnetic resonance; plant root; spectroscopy; Stemona cochinchinensis; Stemonaceae; structure analysis; Alkaloids; Benzopyrans; Magnetic Resonance Spectroscopy; Molecular Structure; Plant Extracts; Plant Roots; Stemonaceae; Stemona