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Phenolic compounds from the cultured mycobionts of Graphis proserpens.

Phytochemistry (2011-05-27)
Yukiko Takenaka, Natsuko Morimoto, Nobuo Hamada, Takao Tanahashi
RESUMEN

Spore-derived mycobionts of the lichen Graphis proserpens were cultivated on a malt-yeast extract medium supplemented with 10% sucrose and their metabolites were investigated. Isocoumarin derivatives 1-3 and 7-oxo-5,7-dihydrooxepino[4,3,2-de]isochromene derivatives, proserins A-C (4-6), were isolated along with three known isocoumarin derivatives and three benzoic acid derivatives. Their structures were determined by spectroscopic methods.

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Sigma-Aldrich
2,6-Dihydroxybenzoic acid, 98%