Abstract Hydrolysis of N'-(3-N-methylcarbamoyloxyphenyl)-N, N-dimethylformamidine (I) has been studied in mixture water-dioxane (4: 1) at pH 1 to 13. The hydrolysis rates of methylcarbamoyl and dimethylformamidine groups are comparable within pH range 4 to 10, and they differ by as much as several orders of magnitude in pH ranges 1-3 and 11-13. The hydrolysis products of the whole pH range have been determined by paper ...