Methyl isoferulate reacts with FeCl₃ to give (2-6) dimer 3 (6-6) dimer 4 and (6-O-3) dimer 5 in low yields, whereas it reacts with Ag₂O leading to (2-O-3) dimer 6 and (6-O-3, 2-O-3) trimer 7. By comparison with literature data, we suggest that the biosynthesis of lithospermic acids and related nor and neolignans that possess a β-2 bond may be due to the cross dimerisation of ferulate radical on isoferulate.

中文翻译：

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异亚硫酸甲酯与FeCl ₃或Ag ₂ O的反应假说对精子酸及其相关的正，新木脂素的生物合成

异亚硫酸甲酯与FeCl ₃反应以低收率得到（2-6）二聚体3（6-6）二聚体4和（6-O-3）二聚体5，而与Ag ₂ O反应生成（2-O- 3）二聚体6和（6-O-3，2-O-3）三聚体7。通过与文献数据比较，我们认为具有β-2键的紫精酸以及相关的nor和neolignans的生物合成可能是由于阿魏酸酯上阿魏酸酯基的交叉二聚作用。