1,4-Benzenedipropanamide, N,N'-bis(4-chloro-2-methoxy-5-methylphenyl)-beta,beta'-dioxo-, ion(2-), disodium 68540-95-4 N,N'-Bis(4-chloro-2-methoxy-5-methylphenyl)-beta,beta'-dioxo-1,4-benzenedipropanamide, disodium salt