Abstract
Two new depsidones,
8-hydroxy-3-methoxy-1,6-dimethyl-11-oxo-11 H-dibenzo[b,e][1,4]dioxepin-7- carboxylic acid (subnotatic
acid) (5) and 8-hydroxy-3-methoxy-1,6,9-trimethyl-11-oxo-11 H- dibenzo[b,e][1,4]dioxepin-7-carboxylic
acid (isonotatic acid) (7), have been detected in
strains of the lichen Parmelia notata Kurok. and isolated and characterized as the corresponding
methyl esters. The structures of the latter compounds have been confirmed by
synthesis.
Cited by
6 articles.
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