Disclosed is R (+)-N-formyl-propargyl-aminoindan, and a process for preparing R(+)-N-formyl-propargyl-aminoindan comprising the steps of: e) mixing R-(+)-N-Propargyl-1-aminoindan (rasagiline) with formic acid in a first solvent such as acetic anhydride at a temperature of less than 30°C f) evaporating the first solvent to obtain an oil g) dissolving the oil in a second solvent such as ethyl acetate to form a solution and h) isolating and obtaining R(+)-N-formyl-propargylaminoindan from the solution.
