SMILES: C1=CC(=CC=C1N2C(=O)C(C(=N2)C(=O)O)N)S(=O)(=O)O
Description: The molecule is a 4,5-dihydropyrazole having p-sulfophenyl-, carboxy-, amino- and oxo substituents at the 1-, 3-, 4- and 5-positions respectively. It is a member of pyrazoles, a monocarboxylic acid, a sulfonic acid and an amino acid. It derives from an antipyrine.