Two new saponins 3-O-β-d-glucopyranosyl (1 → 2)-β-d-mannopyranosyl sarsasapogenin, named timosaponin A IV(1) and (5β, 25S)-26-O-β-d-glucopyranosyl-furost-20(22)-en-3,26-diol-3-O-β-d-glucopyranosyl (1 → 4) gluco...Two new saponins 3-O-β-d-glucopyranosyl (1 → 2)-β-d-mannopyranosyl sarsasapogenin, named timosaponin A IV(1) and (5β, 25S)-26-O-β-d-glucopyranosyl-furost-20(22)-en-3,26-diol-3-O-β-d-glucopyranosyl (1 → 4) glucopyranosyl (1 → 2)-β-d-galacopyranoside, named timosaponin B IV(2), were isolated by silica gel column chromatography and preparative HPLC from Anemarrhena asphodeloides Bge. Their structures were elucidated by chemical characters and spectroscopic analysis.展开更多
目的建立快速、灵敏和准确的大鼠血浆中知母皂苷B-Ⅱ液质联用(HPLC-MS/MS)定量分析方法。方法大鼠血浆样品用乙腈沉淀蛋白,上清液经Alltima HP C18柱(2.1mm×50mm,5μm)分离,采用负离子检测多反应监测模式(MRM)、电喷雾离子化(ESI)...目的建立快速、灵敏和准确的大鼠血浆中知母皂苷B-Ⅱ液质联用(HPLC-MS/MS)定量分析方法。方法大鼠血浆样品用乙腈沉淀蛋白,上清液经Alltima HP C18柱(2.1mm×50mm,5μm)分离,采用负离子检测多反应监测模式(MRM)、电喷雾离子化(ESI)对知母皂苷B-Ⅱ进行定量分析,内标为ParisaponinⅠ(重楼皂苷Ⅰ)。检测离子对为知母皂苷B-Ⅱ离子对(m/z919.4→757.4)与"重楼皂苷Ⅰ"离子对(m/z1033.5→901.4)。结果方法的线性范围为5~2000μg·L-1,最低定量下限5μg·L-1。日内精密度<10.9%,日间精密度<6.6%,准确度为-8.6%~7.5%;每样品分析时间为3min。结论该法准确、灵敏、特异,适用于血浆中知母皂苷B-Ⅱ的测定。展开更多
文摘Two new saponins 3-O-β-d-glucopyranosyl (1 → 2)-β-d-mannopyranosyl sarsasapogenin, named timosaponin A IV(1) and (5β, 25S)-26-O-β-d-glucopyranosyl-furost-20(22)-en-3,26-diol-3-O-β-d-glucopyranosyl (1 → 4) glucopyranosyl (1 → 2)-β-d-galacopyranoside, named timosaponin B IV(2), were isolated by silica gel column chromatography and preparative HPLC from Anemarrhena asphodeloides Bge. Their structures were elucidated by chemical characters and spectroscopic analysis.
文摘目的建立快速、灵敏和准确的大鼠血浆中知母皂苷B-Ⅱ液质联用(HPLC-MS/MS)定量分析方法。方法大鼠血浆样品用乙腈沉淀蛋白,上清液经Alltima HP C18柱(2.1mm×50mm,5μm)分离,采用负离子检测多反应监测模式(MRM)、电喷雾离子化(ESI)对知母皂苷B-Ⅱ进行定量分析,内标为ParisaponinⅠ(重楼皂苷Ⅰ)。检测离子对为知母皂苷B-Ⅱ离子对(m/z919.4→757.4)与"重楼皂苷Ⅰ"离子对(m/z1033.5→901.4)。结果方法的线性范围为5~2000μg·L-1,最低定量下限5μg·L-1。日内精密度<10.9%,日间精密度<6.6%,准确度为-8.6%~7.5%;每样品分析时间为3min。结论该法准确、灵敏、特异,适用于血浆中知母皂苷B-Ⅱ的测定。