2 4 5 triphenyl 1h imidazole July 8, 2019 16 32 64 128 2 4 5 triphenyl 1h imidazole molecular weight 2 4 5 triphenyl 1h imidazole melting point 2 4 5-triphenyl imidazole 4 5-dihydro-2-phenyl-1h-imidazole