1-Hydroxy-7-azabenzotriazole39968-33-731 % similar 9-Fluorenylmethyl 1-benzotriazolyl carbonate82911-71-531 % similar N-Ethylbenzimidazole7035-68-931 % similar 1-Propyl-1H-benzoimidazol-2-ylamine57667-50-230 % similar