1,1'-ethane-1,2-diylbis(3,4-dimethoxybenzene) InChI=1/C18H22O4/c1-19-15-9-7-13(11-17(15)21-3)5-6-14-8-10-16(20-2)18(12-14)22-4/h7-12H,5-6H2,1-4H benzene, 1,1'-(1,2-ethanediyl)bis[3,4-dimethoxy-