Three highly modified cembranoids, quorumolides A–C (1–3), were isolated from Euphorbia antiquorum. Compound 1 is the first example of a cembranoid embedding an α,β-unsaturated-γ-lactone and a tetrahydro-2H-pyran motif within the 14-membered ring. Biosynthetically, it is particularly noteworthy that the stereochemistries of C-2 and C-12 in the pyran ring of 1–3 were opposite to those of marine-derived rare cembranoids.

中文翻译：

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Quorumolides A–C，来自大戟属的三枚长生类

三个高度改性cembranoids，quorumolides A-C（1 - 3）中，从分离火殃勒。化合物1是在14元环内嵌入α，β-不饱和-γ-内酯和四氢-2 H-吡喃基序的类柏酸酯的第一个实例。生物合成，这是特别值得注意的是C-2和C-12的中的吡喃环的立体化学1 - 3分别为相反于那些来自海洋的稀有cembranoids的。