4-Hydroxybenzoic acid hydrazide5351-23-530 % similar 4-Chlorobenzoic acid hydrazide536-40-330 % similar 4-Bromobenzoic acid hydrazide5933-32-430 % similar 3,5-Dichlorobenzhydrazide62899-78-930 % similar 3,5-Dihydroxybenzohydrazide7732-32-330 % similar