60404-77-5

4-[3-(3-carboxy-5-hydroxy-1-(tetrahydro-3-thienyl)-1H-pyrazol-4-yl)allylidene]-4,5-dihydro-5-oxo-1-(tetrahydro-3-thienyl)-1H-pyrazole-3-carboxylic acid S,S,S',S'-tetraoxide