Informed by the 2CPTZ optimisation study, a constant current of 1.0 mA was used as the initial current for the electrosynthesis of CPZ metabolites. Based on the previous analysis of the CV profile of CPZ, the first oxidation occurs at 590 mV, 0.2 Vs -1 , which is higher than 2CPTZ (369 mV, 0.2 Vs -1 ). This means that a higher current is needed to oxidize the CPZ to generate the desired metabolite. As shown in Figure , the potential difference increases proportionally to the current following Ohm's law. The optimal condition for CPZ metabolite electrosynthesis was achieved by using a constant current of 1.0 mA, maximum applied voltage of 3.86 V, with 100% CPZ conversion and generating higher specific CPZ-SO metabolite (11:1, CPZ-SO and CPZ-SO2, respectively). Additionally, 1.0 mA was found to be the best condition due to the lowest ratio of unassigned metabolites (by HPLC and LCMS inspection). The optimisation continued to the highest current used of 3.0 mA. It can be concluded from these results that the higher the current, the more unassigned CPZ metabolites are produced, with no improvement in the ratio of the desired metabolites. Table and Figure demonstrates the optimisation table from the constant current of 1.0-3.0 mA for the CPZ metabolite reaction. During the oxidation process, the reaction mixture changes from a clear solution to pink (~0.95 V) and dark green (at a higher voltage than 1.25 V). Likely due to the deprotonation and one-electron oxidation that occurred. Upon completion of the reaction, a precipitate formed due to the overoxidation product being insoluble in acetonitrile.