16340-50-4 2,3-Dihydro-5,6-diphenyl-2-methylpyrazine 5-23-09-00279 (Beilstein Handbook Reference) BRN 0205957 NSC 97036 Pyrazine, 2,3-dihydro-2-methyl-5,6-diphenyl- (9CI) Pyrazine, 2,3-dihydro-5,6-diphenyl-2-methyl-