4-Aminosalicylic acid hydrazide 6946-29-8 Apacizin Benzoic acid, 4-amino-2-hydroxy-, hydrazide NSC57125 PAS-Hydrazid Pasdrazide Salicylic acid, 4-amino-, hydrazide WLN: ZMVR DZ BQ p-Aminosalicylic acid hydrazide