Glutaramic acid, 4-(2-phenylacetamido)-N-(1-benzyl-4-piperidyl)-, L- L-4-(2-Phenylacetamido)-N-(1-benzyl-4-piperidyl)glutaramic acid MA2900000 N-alpha-(Phenylacetylamino)-gamma-(4-amino-N-benzylpiperidinyl)-L-glutamylamide