1,3-Pyrimidinediacetic acid, hexahydro-5-benzylidene-2,4,6-trioxo-, dipotassium salt 78472-82-9 Barbituric acid, 1,3-bis(carboxymethyl)-5-benzylidene-, dipotassium salt Hexahydro-5-benzylidene-2,4,6-trioxo-1,3-pyrimidinediacetic acid dipotassium salt