[1,1'-Biphenyl]-4-carboxylic acid, 4',4''',4''''',4'''''''-(1,2-ethenediylidene)tetrakis[3-methyl-

[1,1'-Biphenyl]-4-carboxylic acid, 4',4''',4''''',4'''''''-(1,2-ethenediylidene)tetrakis[3-methyl- · CAS 1643112-49-5