Chemical Components from <i>Ceratostigma </i><i>willmottianum</i>

Abstract

Investigation on the whole plant of Ceratostigma willmottianum for bioactive compounds has led to the identification of 15 compounds. Two of them were characterized as new compounds, plumbolactones A (5-(2,3-dihydroxyphenyl)dihydro-4-methyl-2(3H)-furanone, 1) and B (3-(1,2-dihydroxypropyl)-5-hydroxy-1(3H)-isobenzofuranone, 2), while the other 13 were known compounds, plumbagic acid (3), isoshinanolone, epiisoshinanolone, plumbagin (4), N-trans-caffeoyltyramine, N-trans-feruloyltyramine, myricetin, quercetin, tricetin 3‘,5‘-dimethyl ether, vanillic acid, syringic acid, caffeic acid, and 6,7-dihydroxycoumarin. The structures of the new compounds were assigned by 2D-NMR techniques.