29588-43-0 4-NMPB HCl Benzeneacetic acid, .alpha.-hydroxy-.alpha.-phenyl-, 1-methyl-4-piperidinyl ester, hydrochloride Benzilic acid, 1-methyl-4-piperidyl ester hydrochloride JB 336/4 N-Methyl-4-piperidyl benzilate hydrochloride N-Methyl-4-piperidyl diphenylglycolate hydrochloride NSC89278