准葛尔大戟(Euphorbia Soongarica Boiss)在民间长期被用来作为逐水药,但其化学成分未见报道。为此,我们对其成分进行了研究。本文报道从中分得的一新三萜成分的分离与鉴定。 从该植物根的石油醚萃取物中,经硅胶柱层析得白色晶状物,在薄层层析中,为一单点,但其质谱有m/z 440和m/z 454两个分子离子峰,反复柱层析和重结晶得晶Ⅰ和晶Ⅱ(图1)。用硝酸银的氨溶液浸泡过的硅胶板进行薄层层析,R_f值不同,且熔点也不同。晶Ⅰ的质谱表 Euphorbia Soongarica Boiss has long been used as a water-based medicine in the private sector, but its chemical composition has not been reported. For this reason, we have studied its ingredients. This article reports the separation and identification of a new triterpenoid component from this. From the petroleum ether extract of the plant root, a white crystal was obtained by silica gel column chromatography. In a thin layer chromatography, it was a single point, but its mass spectrometer had two molecules: m/z 440 and m/z 454. Ion peaks, repeated column chromatography and recrystallization yielded crystal I and crystal II (Figure 1). Thin-layer chromatography was performed on a silica gel plate soaked in an ammonia solution of silver nitrate, the Rf value was different, and the melting point was also different. Crystal I Mass Spectrometer