The benzyl ester echinocarpic acid (1′,4′-dihydroxy-6'-methoxy-3′-oxo-1′,3′-dihydroisobenzo-furan-5′-ylmethyl 2,4-dihydroxy-3,6-dimethylbenzoate) (7) has been isolated from the lichen Parmelia norcrambidiocarpa together with atranorin and chloroatranorin. The structure of the compound (7) followed from a combination of spectroscopic and chemical data.
棘皮酸苄酯(1′,4′-二羟基-6'-甲氧基-3′-氧代-1′,3′-二氢异苯并呋喃-5′-基甲基 2,4-二羟基-3、6-二甲基苯甲酸酯)(7)与阿特拉诺林(atranorin)和氯阿特拉诺林(chloroatranorin)一起从地衣 Parmelia norcrambidiocarpa 中分离出来。化合物 (7) 的结构是根据光谱和化学数据综合确定的。