A high-performance liquid chromatography (HPLC) method has been developed for the first time to simultaneously quantify the four active ingredients, namely aloha, baicalein, aloe-emodin and wogonin, in Dangguilonghu...A high-performance liquid chromatography (HPLC) method has been developed for the first time to simultaneously quantify the four active ingredients, namely aloha, baicalein, aloe-emodin and wogonin, in Dangguilonghui tablet. The marker compotmds were separated on the Diamonsil C18 column at a flow rate of 1.0 mL/min with a mobile phase of methanol-acetonitrile-0.3% aqueous phosphoric acid (220: 4: 200, v/v/v) and while the detection wavelength was set at 225 nm. The assay was linear over the range of 1.450 - 29.00 ug/mL (r = 0.9992) for aloin, 0.4050 - 8.100ug/mL (r = 0.9994) for baicalein, 0.1100 - 2.200 ug/mL (r = 0.9997) for aloe-emodin, 0.2160 - 4.320 ug/mL (r = 0.9991) for wogonin, respectively. The average sample recoveries at three concentration levels were 100.7% (RSD = 0.88%), 101.0% (RSD = 0.89%), 100.0% (RSD = 1.3%) and 100.1% (RSD = 1.1%) for these constituents, respectively. This method is suitable for the quality control of Dangguilonghui tablet.展开更多
Nine coumarin compounds were further isolated from Angelica pubescence. They were columbianedin (1), osthol (2), bergapten (3), isoimperaterin (4), meranzin hydrate (5), nodakenetin (6), marmesinin (7), columbianin (8...Nine coumarin compounds were further isolated from Angelica pubescence. They were columbianedin (1), osthol (2), bergapten (3), isoimperaterin (4), meranzin hydrate (5), nodakenetin (6), marmesinin (7), columbianin (8) and angelidiol (9). Among them, 5~8 were isolated for the first time from this plant, 9 is a new natural product.展开更多
文摘A high-performance liquid chromatography (HPLC) method has been developed for the first time to simultaneously quantify the four active ingredients, namely aloha, baicalein, aloe-emodin and wogonin, in Dangguilonghui tablet. The marker compotmds were separated on the Diamonsil C18 column at a flow rate of 1.0 mL/min with a mobile phase of methanol-acetonitrile-0.3% aqueous phosphoric acid (220: 4: 200, v/v/v) and while the detection wavelength was set at 225 nm. The assay was linear over the range of 1.450 - 29.00 ug/mL (r = 0.9992) for aloin, 0.4050 - 8.100ug/mL (r = 0.9994) for baicalein, 0.1100 - 2.200 ug/mL (r = 0.9997) for aloe-emodin, 0.2160 - 4.320 ug/mL (r = 0.9991) for wogonin, respectively. The average sample recoveries at three concentration levels were 100.7% (RSD = 0.88%), 101.0% (RSD = 0.89%), 100.0% (RSD = 1.3%) and 100.1% (RSD = 1.1%) for these constituents, respectively. This method is suitable for the quality control of Dangguilonghui tablet.
文摘Nine coumarin compounds were further isolated from Angelica pubescence. They were columbianedin (1), osthol (2), bergapten (3), isoimperaterin (4), meranzin hydrate (5), nodakenetin (6), marmesinin (7), columbianin (8) and angelidiol (9). Among them, 5~8 were isolated for the first time from this plant, 9 is a new natural product.