5604-32-0 NSC60765 Urea, 1,1'-p-phenylenebis[3-[p-(1,4,5,6-tetrahydro-2-pyrimidinyl)phenyl]-, dihydrochloride Urea, N,N''-1,4-phenylenebis-[N'-[4-(1,4,5,6-tetrahydro-2-pyrimidinyl)phenyl]-, dihydrochloride