1,1',1'',1'''-ethene-1,1,2,2-tetrayltetrabenzene 632-51-9 InChI=1/C26H20/c1-5-13-21(14-6-1)25(22-15-7-2-8-16-22)26(23-17-9-3-10-18-23)24-19-11-4-12-20-24/h1-20 benzene, 1,1',1'',1'''-(1,2-ethenediylidene)tetrakis-