ChemInform Abstract: Synthesis of 14C Labelled Compounds of Biological Interest. MK-142 and ROM-196 (N,Nâ²-Di-[3-(p-methoxy-phenoxy)-2-hydroxy-propyl]-ethylenediamine Dimethane-sulfonate and N,Nâ²-Dimethyl-di-[3-(p-methoxy-phenoxy)-2-hydroxy-propyl]-ethylen