NSC106916 Urea, 1-(2-fluoroethyl)-1-nitroso-3-(1,2,3,4-tetrahydro-2,4-dioxo-5-pyrimidinyl)- Urea, N-(2-fluoroethyl)-N-nitroso-N'-(1,2,3,4-tetrahydro-2,4-dioxo-5-pyrimidinyl)-