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 60404-77-5 EINECS 262-220-5