4'-Carboxyacetanilide 4-Acetamidobenzoic acid 4-Acetylaminobenzoic acid 4-Carboxyacetanilide 556-08-1 Benzoic acid, 4-(acetylamino)- Benzoic acid, p-acetamido- N-Acetyl-p-aminobenzoic acid NSC4002 PAAB p-Acetamidobenzoic acid p-Acetaminobenzoic acid p-Acetoaminobenzoic acid p-Acetylaminobenzoic acid