1-Benzyl-4-(3-phenyl-4-methylphenyl)-3,5-diketopiperazine 13480-16-5 2,6-Piperazinedione, 4-benzyl-1-(6-methyl-1,1'-biphenyl-3-yl)- 4-Benzyl-1-(6-methyl-1,1'-biphenyl-3-yl)-2,6-piperazinedione 5-24-05-00312 (Beilstein Handbook Reference) BRN 0766466