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Following the general nucleophilic carbamoylation procedure, tranexamic acid (1.1 g, 7.0 mmol) and 1-[(2,5-dioxopyrrolidinyl)oxycarbonyloxy]ethyl benzoate (800 mg, 2.6 mmol) were reacted in the MTBE/acetone/water mixture (16 mL) to yield the title compound 23 (160 mg, 18% yield) as a white powder after work-up and mass-guided preparative HPLC purification. 1H NMR (400 MHz, DMSO-d6): δ=0.87-0.96 (m, 2H), 1.21-1.38 (br. m, 3H), 1.57 (d, J=5.6 Hz, 3H), 1.71-1.74 (m, 2H), 1.88-1.91 (m, 2H), 2.1-2.2 (m, 1H), 2.84-2.88 (m, 2H), 6.92 (q, J 5.6 Hz, 1H), 7.54-7.58 (m, 3H), 7.70 (m, 1H), 7.94-7.96 (m, 2H), 12.05 (br. s, 1H). MS (ESI) m/z 372.10 (M+Na)+; 348.05 (M−H)−.