ethyl 3-[(3-ethoxy-3-oxopropyl)(4-methoxybenzyl)amino]-2,2-difluoropropanoate

ethyl 5,5-difluoro-1-(4-methoxybenzyl)-4-oxopiperidine-3-carboxylate

3,3-difluoro-1-(4-methoxy benzyl)piperidin-4-one