从离瓣寄生Helixanthera parasitica的叶中分得4种结晶。经理化性质及光谱分析鉴定为没食子酸乙酯（Ⅰ）、没食子酸（Ⅱ）、槲皮甙（Ⅲ）、5，7，3′，4′-四羟基黄烷（5，7，3′，4′－tetrahydroxyflavan，Ⅳ）。Ⅳ为一新的黄烷化合物。

Four compounds were isolated from the leaves of Helixantbera parasitica, They Were identified as ethyl gallate(I)，gallic acid(1I)，4uercitrin(IQ)and 5,7.3',4，-tetrahydroxyflavan(W)on the basis of chemical properties and spectral data, Compound IV s a new flavan