5'-hydroxy-2H,5H-dispiro(cyclopent-3-ene-1,1'-cyclopent(3)ene-2',2''-naphtho(1,8-de)(1,3)dioxine)-2,5-dione
5'-hydroxy-2h,5h-dispiro(cyclopent-3-ene-1,1'-cyclopent(3)ene-2',2''-naphtho(1,8-de)(1,3)dioxine)-2,5-dione