(4-Hydroxybenzoyl)hydrazine (p-Hydroxybenzoyl)hydrazine 4-Hydroxybenzohydrazide 4-Hydroxybenzoic acid hydrazide 5351-23-5 Benzoic acid, 4-hydroxy-, hydrazide Benzoic acid, p-hydroxy-, hydrazide NSC647 p-Hydroxybenzhydrazide p-Hydroxybenzoic acid hydrazide p-Hydroxybenzoic hydrazide