Thelephantins I–N: p-terphenyl derivatives from the inedible mushroom Hydnellum caeruleum

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Phytochemical investigation of the methanolic extract of the fruiting bodies of the inedible mushroom Hydnellum caeruleum resulted in the isolation of six p-terphenyl derivatives named thelephantins I–N ( 1– 6), together with a known compound, dihydroaurantiacin dibenzoate ( 7). These structures were determined by high-resolution MS, 2D NMR, IR and UV spectroscopic analysis, and by the chemical reactions.