2-Piperidineacetic acid, .alpha.-phenyl-, methyl ester, hydrochloride 298-59-9 Centedrin Centedrine METHYLPHENIDATE HYDROCHLORIDE Meridil Methyl .alpha.-phenyl-2-piperidineacetate hydrochloride Methylphenidate HCl Methylphenidylacetate hydrochloride Metilfenidat hydrochloride NSC169868 Phenidylate Ritalin Ritalin Hydrochloride WLN: T6MTJ BYR & VO1 & GH