8,9-dimethoxynaphtho[2',3':3,4]cyclobuta[1,2-b]quinoxaline InChI=1/C20H14N2O2/c1-23-17-9-11-7-13-14(8-12(11)10-18(17)24-2)20-19(13)21-15-5-3-4-6-16(15)22-20/h3-10H,1-2H naphtho[2',3':3,4]cyclobuta[1,2-b]quinoxaline, 8,9-dimethoxy-