Showing structure for 6',15'-dimethyl 1,2',3,5-tetrahydroxy-7-methyl-4,4'-dioxo-6'-(5-oxooxolan-2-yl)-1,3-dihydro-7'-oxaspiro[naphthalene-2,12'-tricyclo[8.5.0.0³,⁸]pentadecane]-1',3'(8'),9',13'-tetraene-6',15'-dicarboxylate