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Cladionol A, a polyketide glycoside from marine-derived fungus Gliocladium species
Yuu Kasai1, Kazusei Komatsu, Hideyuki Shigemori
1Graduate School of Pharmaceutical Sciences, Hokkaido University, Sapporo 060-0812, Japan.
Abstract:
A new polyketide glycoside, cladionol A (1), was isolated from the cultured broth of a fungus Gliocladium sp., which was separated from sea grass Syringodium isoetifolium, and the structure was elucidated by spectroscopic data. The relative stereochemistry of C-2-C-3 was assigned by mainly J-based configuration analysis, while those of two sugar units were elucidated to be beta-mannopyranoside and arabitol on the basis of NOESY data and/or 1H-1H couplings. Furthermore, the absolute configuration of the mannose moiety was determined as the D-form on the basis of chiral HPLC analysis of a benzoyl derivative of the acid hydrolysate of 1. Cladionol A (1) exhibited modest cytotoxicity.
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