唐古特白刺(Nitraria tangutorum Boler)系蒺藜科白刺属植物,民间用于治疗脾胃虚弱,消化不良,神经衰弱,感冒等症,其化学成分研究尚未见文献报道。本文报道从唐古特白刺种子中分得6个黄酮类化合物:异鼠李素-7-O-α-L-鼠李糖甙、山奈素-7-O-α-L-鼠李糖甙、异鼠李素-7-O-β-D-葡萄糖甙、槲皮素-7-O-α-L-鼠李糖甙、异鼠李糖、槲皮素。前4个化合物首次从该属植物中分得,它们的存在对我国白刺属植物分类将有一定意义。 Nitraria tangutorum Boler is a genus of Nitraria tangutorum belonging to the genus Nitraria. It is widely used in the treatment of spleen and stomach, indigestion, neurasthenia, and cold. It has not been reported in the literature. This paper reports that six flavonoids were isolated from seeds of T. tangutorum: isorhamnetin-7-O-α-L-rhamnoside, kaempferol-7-O-α-L-rhamnoside. Isorhamnetin-7-O-β-D-glucoside, quercetin-7-O-α-L-rhamnoside, isorhamnose, quercetin. The first four compounds were obtained from this genus for the first time. Their presence will have a certain significance for the classification of Nitraria species in China.