Abstract
The isolation and characterization of the constituents of 4 Lecanora are described. L. viridula contains aspicillin, L. polytropa zeorin, a new triterpene eulecanorol, (+)-usnic acid and rangiformic acid, L. badia var. milvina lobaric acid and (+)-usnic acid and L. sulphurea zeorin and (+)-usnic acid.

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