New dibenz[b, f]oxepins from Cercis chinensis Bunge.

Authors :: Mu LH
Li JB
Yang JZ
Zhang DM
Source :: Journal of Asian natural products research [J Asian Nat Prod Res] 2007 Sep-Dec; Vol. 9 (6-8), pp. 649-53.
Publication Year :: 2007
Abstract: Three new dibenz[b,f]oxepins: 6-methoxy-7-methyl-8-hydroxydibenz[b, f]oxepin (1), 1,8-dimethoxy-6-hydroxy-7-methyldibenz[b, f]oxepin (2), and 1-hydroxy-6,8-dimethoxy-7-methyldibenz[b,f]oxepin (3), along with two known dibenz[b,f]oxepins pacharin (4) and bauhiniastatin 4 (5), were isolated from Cercis chinensis Bunge (Leguminosae). Their structures were elucidated on the basis of spectroscopic evidence (EI-MS, UV, IR, (1)H, (13)C and 2D NMR). Compounds 1-5 were isolated from the Cercis genus for the first time.