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Updated: Aug 19, 2026

Designed for Molecular Recycling: A Lignin-Derived Semi-aromatic Biobased Polymer
Published on: November 30, 2020
Three new polymeric isopropenyl benzofurans from Ligularia stenocephala
Fu-Lin Yan1, Ai-Xia Wang, Zhong-Jian Jia
1College of Chemistry and Chemical Engineering, National Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou, People's Republic of China.
Abstract:
Three new polymeric isopropenyl benzofurans, 4-methyl-2,4-bis(5,6-dimethoxy-2-benzofuranyl)-1-pentene, stenocephalin A (1), 4,6-dimethyl-2,4,6-tri(5,6-dimethoxy-2-benzofuranyl)-1-heptene, stenocephalin B (2) and 4,6,8-trimethyl-2,4,6,8-tetra(5,6-dimethoxy-2-benzofuranyl)-1-nonene, stenocephalin C (3), together with seven known compounds (4-10) were isolated from the roots of Ligularia stenocephala. The structures of the new compounds were elucidated on the basis of spectral evidence, especially on 2D NMR. In addition, the cytotoxic activity and the anti-bacterial activity of compounds 2, 3, 5 and 6 were tested.
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