5,5a-Dihydro-1,5a,9,13-tetrahydroxy-3,7-dimethyl-4H,10H,12H,16H-dibenzo[de,d'e']furo[2,3-g:5,4-i']bis[2]benzopyran-4,10,16-trione
5,5a-Dihydro-1,5a,9,13-tetrahydroxy-3,7-dimethyl-4H,10H,12H,16H-dibenzo[de,d'e']furo[2,3-g:5,4-i']bis[2]benzopyran-4,10,16-trione