1H-Pyrrole-2,5-dione, potassium silver(1+) salt (2:1:1) 541-59-3 67859-67-0 Bis(1H-pyrrole-2,5-dione), potassium silver(1+) salt EINECS 267-415-9 Potassium silver 3-pyrroline-2,5-dione