5-Carboxy-2,3-diphenyl-2H-tetrazol-3-ium
5-Carboxy-2,3-diphenyl-2H-tetrazol-3-ium ??
??
5-Carboxy-2,3-diphenyl-2H-tetrazol-3-ium C??? ??, ??, ??
5-Carboxy-2,3-diphenyl-2H-tetrazol-3-ium ?? ?? ? ???
???
?? ??
5-Carboxy-2,3-diphenyl-2H-tetrazol-3-ium ?? ??
???( 0)?? ??