This invention relates to a process for producing 5-methyl-N-aryl-2-pyrrolidone, 5-methyl-N-alkyl-2-pyrrolidone, and 5-methyl-N-cycloalkyl-2-pyrrolidone by reductive amination of levulinic acid esters with aryl or alkyl amines utilizing a metal catalyst, which is optionally supported. The method comprises placing a carbon-containing diffusion suppressant in the target area at approximately 50% of the concentration of the dopant, and activating the dopant by an approximately 1,040 degree Celsius thermal anneal. The easy axis current is compared to the high threshold. Upon receiving the replay request, the emulator may re-emulate the game inputs that have been stored in the emulator’s memory.