Composition #2: Huang, Xiao-Xiao., Zhou, Chen-Chen., Li, Ling-Zhi., Li, Fei-Fei., Lou, Li-Li., Li, Dian-Ming., Ikejima, Takshi., Peng, Ying., Song, Shao-Jiang. The cytotoxicity of 8-O-4 ' neolignans from the seeds of Crataegus pinnatifida . bioorganic & medicinal chemistry letters, 2013, vol. 23, no. 20, p. 5599–5604. DOI: 10.1016/j.bmcl.2013.08.045.
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