<unk>  (also known as para-aminobenzoic<unk>  or PABA) is an organic compound with the molecular formula C7H7NO2.  PABA is a white crystalline substance that is only slightly soluble in water.  It consists of a benzene ring substituted with an amino group and a carboxylic<unk> .
4-Aminobenzoic acid
8-Hyydroxyquinoline
N-Nitroso-N-methylurea
N-Nitroso-N-Methylurea
Iodoquinol
Diiodohydroxyquinoline
Dimetacrine
Acetrizoic acid