Trifluoromethanesulfonic acid 2-Aminobenzotrifluoride 4-Methylphenylhydrazine hydrochloride 4-Hydrazinylbenzoic acid Phenylhydrazine Phenylhydrazine hydrochloride 3-(Trifluoromethyl)benzaldehyde 2-(Trifluoromethyl)benzoic acid 4-(Trifluoromethyl)phenylhydrazine hydrochloride 2-(Trifluoromethyl)phenylhydrazine hydrochloride