124391-91-9 AM 682 Benzoic acid, 2-((4-carboxybenzoyl)amino)-4-((1-oxopropyl)amino)-, 1-ethyl ester, monosodium salt Benzoic acid, 2-((4-carboxylbenzoyl)amino)-4-((1-oxopropyl)amino)-, 1-ethyl ester, monosodium salt Ethyl 2-(4-carboxybenzamido)-4-propionamidobenzoate sodium salt