Predomination of Dimers over Naturally Occurring Anthraquinones in Soil 1998

Fujitake, and Suzuki, and Fukumoto, and Oji
Department of Biological and Environmental Science, Faculty of Agriculture, Kobe University, Kobe 657, Japan.

Four bianthraquinones and two monoanthraquinones were isolated as the major soil anthraquinones from a volcanic ash soil in Japan. They were identified as a new natural product 5,5'-biphyscion (named hinakurin) (3) and five known compounds, chrysotalunin (1), (-)-7,7'-biphyscion (2), microcarpin (4), chrysophanol (5), and physcion (6) using MS, 1D NMR, and 2D NMR techniques. Although the dimers (1-4) are rarely found as natural products, they, along with 5 and 6, were ubiquitous and predominant over other anthraquinones in various soils from Japan and Nepal.

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