1,1'-ethyne-1,2-diylbis(2,5-dipropoxybenzene) InChI=1/C26H34O4/c1-5-15-27-23-11-13-25(29-17-7-3)21(19-23)9-10-22-20-24(28-16-6-2)12-14-26(22)30-18-8-4/h11-14,19-20H,5-8,15-18H2,1-4H benzene, 1,1'-(1,2-ethynediyl)bis[2,5-dipropoxy-