A new triterpenoid has been isolated from the leaves and stems of Fritillaria hupehensis Hsiao et K.C. Hsia. Its structure was established as （2329-9,19-cycloart-23-ene-3α,25-diol 1 through chemical and spectroscopi...A new triterpenoid has been isolated from the leaves and stems of Fritillaria hupehensis Hsiao et K.C. Hsia. Its structure was established as （2329-9,19-cycloart-23-ene-3α,25-diol 1 through chemical and spectroscopic studies including 2D NMR. Another known triterpenoid 9,19-cycloart-25-ene-313,24ζ-diol 2 was also isolated.展开更多
A new five-coordinate mixed-ligand compound, di-n-butyl（3,4-difluorobenzoxy）（3,4-difluorobenzohydroxamato）tin（Ⅳ） 1 was synthesized and characterized by IR, ^1H, ^13C, ^119Sn NMR spectra and single crystal X-ray...A new five-coordinate mixed-ligand compound, di-n-butyl（3,4-difluorobenzoxy）（3,4-difluorobenzohydroxamato）tin（Ⅳ） 1 was synthesized and characterized by IR, ^1H, ^13C, ^119Sn NMR spectra and single crystal X-ray diffraction technique.展开更多
文摘A new triterpenoid has been isolated from the leaves and stems of Fritillaria hupehensis Hsiao et K.C. Hsia. Its structure was established as （2329-9,19-cycloart-23-ene-3α,25-diol 1 through chemical and spectroscopic studies including 2D NMR. Another known triterpenoid 9,19-cycloart-25-ene-313,24ζ-diol 2 was also isolated.
文摘A new five-coordinate mixed-ligand compound, di-n-butyl（3,4-difluorobenzoxy）（3,4-difluorobenzohydroxamato）tin（Ⅳ） 1 was synthesized and characterized by IR, ^1H, ^13C, ^119Sn NMR spectra and single crystal X-ray diffraction technique.
