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作者等前曾报道益母草LeonurusHeterophyllusSweet中含有抗血小板激活因子（PAF）物质prehispanolone。在进一步的研究中又分得2个新的半日花烷双萜：leoheterin，15，16环氧-7β，9α-二羟基半日花-13（16），14双烯-6-酮（Ⅰ）和Preleoheterin，9α，13R－15，16-双环氧-7β
The authors et al. previously reported that Leonurus Heterophyllus Sweet contains Motherboard of anti-platelet activating factor (PAF) prehispanolone. In the further study, two new half-day diasporas were assigned: leoheterin, 15,16epoxy-7β, 9α-dihydroxyhalfyloba-13(16), 14-diene-6-one (I) And Preleoheterin, 9α, 13R-15, 16-Depoxy-7β