Two mild-cytotoxic bistetrahydrofuran (THF) ring annonaceous acetogenins named calamistrins F(1) and G(2) were isolated from the ethanolic extract of the roots of U. calamistrata Hance. Their structures including the ...Two mild-cytotoxic bistetrahydrofuran (THF) ring annonaceous acetogenins named calamistrins F(1) and G(2) were isolated from the ethanolic extract of the roots of U. calamistrata Hance. Their structures including the relative and absolute configurations were determined by chemical derivation and spectral analysis. Calamistrins F and G were a pair of epimers at C-26 which both had THF ring from C-18 to C-25 and three OH groups at C-5, C-17 and C-26.展开更多
Two new polyoxygenated cyclohexenes, named uvacalolA (1),and B (2) were isolated from the rhizomes of Uvaria calamistrata. On the basis of spectral analysis and chemical derivatization, including preparation of Mosher...Two new polyoxygenated cyclohexenes, named uvacalolA (1),and B (2) were isolated from the rhizomes of Uvaria calamistrata. On the basis of spectral analysis and chemical derivatization, including preparation of Mosher esters, the structure of 1 to 2 were established.展开更多
Calamistrin E, the first Annonaceous acetogenin with C=C bond in the aliphatic chain from the genus Uvaria was isolated from U. calamistrata. Its structure including relative and absolute configurations was determined...Calamistrin E, the first Annonaceous acetogenin with C=C bond in the aliphatic chain from the genus Uvaria was isolated from U. calamistrata. Its structure including relative and absolute configurations was determined by chemical derivation and spectral analysis.展开更多
文摘Two mild-cytotoxic bistetrahydrofuran (THF) ring annonaceous acetogenins named calamistrins F(1) and G(2) were isolated from the ethanolic extract of the roots of U. calamistrata Hance. Their structures including the relative and absolute configurations were determined by chemical derivation and spectral analysis. Calamistrins F and G were a pair of epimers at C-26 which both had THF ring from C-18 to C-25 and three OH groups at C-5, C-17 and C-26.
文摘Two new polyoxygenated cyclohexenes, named uvacalolA (1),and B (2) were isolated from the rhizomes of Uvaria calamistrata. On the basis of spectral analysis and chemical derivatization, including preparation of Mosher esters, the structure of 1 to 2 were established.
文摘Calamistrin E, the first Annonaceous acetogenin with C=C bond in the aliphatic chain from the genus Uvaria was isolated from U. calamistrata. Its structure including relative and absolute configurations was determined by chemical derivation and spectral analysis.
