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Fungal Metabolites. Part 43. New Nardosinane and Aristolane Sesquiterpenes from the Fruiting Bodies of Russula lepida.-Three new naturally occurring sesquiterpenes, rulepidanol (III) and rulepidadienes A (II) and B (IV), and aristolone (I) are isolated from the fruiting bodies of Russula lepida. These compounds are the first nardosinane and aristolane sesquiterpenes isolated from Basidiomycetes.-(VIDARI, G.; CHE, Z.; GARLASCHELLI, L.; Tetrahedron Lett. 39 (1998) 33, 6073-6076; Dip. Chim.