1H-Imidazole-4-carboxaldehyde,1-(triphenylmethyl)- , its cas register number is 33016-47-6. It also can be called 1-Trityl-1H-imidazole-4-carbaldehyde ; 1-Trityl-4-formylimidazole ; and 1-Tritylimidazole-4-carboxaldehyde .