1,3-Bis(hydroxymethyl)hexahydro-2-pyrimidinone 1,3-Bis(hydroxymethyl)hexahydropyrimidin-2-one 2(1H)-Pyrimidinone, tetrahydro-1,3-bis(hydroxymethyl)- 3270-74-4 DMP DMPU Dimethylolpropyleneurea Fixapret PH Knittex PRS N,N'-Bis(hydroxymethyl)propyleneurea N,N'-Dimethylolpropyleneurea NSC70228