In a search for structurally interesting substances from traditional Chinese medicines, eight compounds were isolated from an ethanolic extract of the stem bark of Daphne giraldii Nitsche. On the basis of one- and two...In a search for structurally interesting substances from traditional Chinese medicines, eight compounds were isolated from an ethanolic extract of the stem bark of Daphne giraldii Nitsche. On the basis of one- and two-dimensional nuclear magnetic resonance and mass spectrometry data, and chemical methods, their structures were determined to be 2H-1-benzopyran-2-one-8-hydroxy-7-O-β-D-glucopyranosyl-5-（2-oxo- 2H-1-benzopyran-7-hydroxy-8-yloxy） （compound 1）, 1-pentanone, 1-（4-hydroxyphenyl）-5-phenyl （compound 2）, octadecyl caffeate （compound 3）, （＋）syringaresinol-4,4＇-diglycoside （compound 4）, daphnetin-8-O-β-D- glucopyranoside （compound 5）, p-hydroxybenzoic acid （compound 6）, 7,7＇-dihydroxy-[6, 8＇-bi-2H-benzopyran]- 2, 2＇-dione （compound 7）, and daphnorin （compound 8）, respectively. Of the compounds isolated, compounds 1 and 2, which we named daphnolin and daphnolon, respectively, were new, and the others were obtained from this plant for the first time.展开更多
文摘In a search for structurally interesting substances from traditional Chinese medicines, eight compounds were isolated from an ethanolic extract of the stem bark of Daphne giraldii Nitsche. On the basis of one- and two-dimensional nuclear magnetic resonance and mass spectrometry data, and chemical methods, their structures were determined to be 2H-1-benzopyran-2-one-8-hydroxy-7-O-β-D-glucopyranosyl-5-（2-oxo- 2H-1-benzopyran-7-hydroxy-8-yloxy） （compound 1）, 1-pentanone, 1-（4-hydroxyphenyl）-5-phenyl （compound 2）, octadecyl caffeate （compound 3）, （＋）syringaresinol-4,4＇-diglycoside （compound 4）, daphnetin-8-O-β-D- glucopyranoside （compound 5）, p-hydroxybenzoic acid （compound 6）, 7,7＇-dihydroxy-[6, 8＇-bi-2H-benzopyran]- 2, 2＇-dione （compound 7）, and daphnorin （compound 8）, respectively. Of the compounds isolated, compounds 1 and 2, which we named daphnolin and daphnolon, respectively, were new, and the others were obtained from this plant for the first time.
