156724-47-9 3-Piperidinecarboxylic acid, 1-(2-(1,3-dioxan-2-ylethyl)-4-(1-oxopropyl)phenylamino)-, methyl ester Methyl 1-(2-(1,3-dioxan-2-yl)ethyl)-4-((1-oxopropyl)phenylamino)-3-piperidinecarboxylate