4-methoxycyclobuta[b]naphthalene-1,2-dione InChI=1/C13H8O3/c1-16-11-4-2-3-7-5-9-10(6-8(7)11)13(15)12(9)14/h2-6H,1H cyclobuta[b]naphthalene-1,2-dione, 4-methoxy-