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Bromocatechol conjugates from a Chinese marine red alga, Symphyocladia latiuscula
- Xu, Xiuli, Yang, Haijin, Khalil, Zeinab G., Yin, Liyuan, Xiao, Xue, Salim, Angela A., Song, Fuhang, Capon, Robert J.
- Phytochemistry 2019 v.158 pp. 20-25
- Rhodophyta, aconitic acid, biochemical pathways, coastal water, solvolysis, spectral analysis, China
- This study describes an investigation into polybromocatechol conjugates isolated from a marine red alga, Symphyocladia latiuscula (Harvey) Yamada, collected from coastal waters off Qingdao, China. We report on the isolation and characterisation of eight undescribed aconitic acid conjugates, symphyocladins R-X, including a likely solvolysis artifact of symphyocladin S, and an undescribed furanoyl conjugate, symphyocladin Y. Structure elucidation was achieved by detailed spectroscopic analysis. A plausible biosynthetic pathway linking all these co-metabolites through a cascade of quinone methide additions is proposed.