During the experiment, a couple of side reactions took place and an overview of the products of the side reactions is shown below in Figure . As described in subsection 3.4, the signal corresponding to one of the β-protons of MA was used to determine the concentration of MA and to follow the course of the reaction. This β-proton is present in all side-products of MA and its chemical shift is barely affected by deuteration of MA, only a change from doublet to singlet is observed. Therefore, all loss in intensity of the signal corresponding to this β-proton can be attributed to conversion of MA to the MBH product.