in ethanol; water aq. soln. of Cu acetate was added to aq. EtOH soln. of aspirin, mixt. was heated at 40°C; filtered off, washed with aq. EtOH, dried over CaCl2; elem. anal.;

NaBH4 in ethanol to soln. Cu acetate (EtOH) added soln. NaBH4 (EtOH); ppt. centrifugation; washed (H2O, EtOH); dried in vac. at 100°C for 2 h;;