CAS 557-24-4 appears in our catalog under these names: (Z)-4-Amino-4-oxobut-2-enoic acid, (Z)-4-Amino-4-oxobut-2-enoic acid 98%, (Z)-4-Amino-4-oxobut-2-enoic acid, 96.87%, Maleamic acid, Maleic Acid Monoamide, >98.0%(HPLC)(T). Offered by: TargetMol, Ambeed, MedChemExpress, GLPBio, TCI. Available pack sizes: 1g, 25g, 100g, 5 g, 10mM/1mL, 1 g, 100mg, 500g.