davallialactone

Noun

 * 1) A phenolic lactone (4Z)-3-(3,4-dihydroxyphenyl)-6-[(E)-2-(3,4-dihydroxyphenyl)ethenyl]-8-hydroxy-4-(2-oxopropylidene)-3,3a-dihydrofuro[3,4-c]oxepin-1-one related to hispidin