for the following products
4-(Methoxy-methyl-carbamoyl)-piperidine-1-carboxylic acid tert-butyl ester | 4-[(Methoxymethylamino)carbonyl]-1-piperidinecarboxylic acid 1,1-dimethylethyl ester | N'-Boc-N-Methoxy-N-methylpiperidine-4-carboxamide | tert-Butyl 4-[methoxy(methyl)carbamoyl]piperidine-1-carboxylate and 1-Boc-4-(Methoxy-methyl-carbamoyl)piperidine
