[Cl:1][CH2:2][CH2:3][NH:4][C:5]([N:7]([CH2:13][CH2:14][CH3:15])[CH2:8][CH:9]([OH:12])[CH2:10][OH:11])=[O:6].[N:16]([O-])=[O:17].[Na+]>C(O)(=O)C>[Cl:1][CH2:2][CH2:3][N:4]([N:16]=[O:17])[C:5]([N:7]([CH2:13][CH2:14][CH3:15])[CH2:8][CH:9]([OH:12])[CH2:10][OH:11])=[O:6]3 g 1-(2-chloroethyl)-3-n-propyl-3-(2,3-dihydroxy-n-propyl)urea are dissolved in 10 ml of acetic acid, and 1.5 g of sodium nitrite are added thereto under stirring. The mixture is stirred at the same temperature for 4 hours. After the reaction, the mixture is treated in the same manner as described in Example 62-(2). 1.7 g of 1-(2-chloroethyl)-1-nitroso-3-n-propyl-3-(2,3-dihydroxy-n-propyl)urea are thereby obtained as a yellow oil.
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