NSC 189811 Urea, 1-(2-chloroethyl)-3-(2-methyl-1,3-dithian-5-yl)-1-nitroso-, cis- Urea, N-(2-chloroethyl)-N'-(2-methyl-1,3-dithian-5-yl)-N-nitroso-, cis- YS5010800 cis-N-(2-Chloroethyl)-N'-(2-methyl-1,3-dithian-5-yl)-N-nitrosourea