2-Imidazolidinone, 4-methyl- 4-Methyl-2-imidazolidinone 4-Methylimidazolidin-2-one 6531-31-3 AI3-62204 EINECS 229-427-2 NSC 44967 Propylene urea Propyleneurea (VAN) Urea, N,N'-(1-methyl-1,2-ethanediyl)-