3-Hydroxybenzoic hydrazide may be used in the following studies:As starting reagent in the preparation of hydrazide intermediates, required for the synthesis of the brevenal analogs.Synthesis ofN′-[4-(dimethylamino)benzylidene]-3-hydroxybenzohydrazide.Synthesis ofN′-(5-bromo-2-hydroxybenzylidene)-3-hydroxybenzohydrazide.