1-methyl-3-ethyl-4-phenyl-2-piperideine
1-methyl-2-cyano-3-ethyl-4-(α-hydroxybenzyl)-2-piperideine
1-methyl-2-cyano-2-deuterio-3-ethyl-4-thiophenylpiperidine
1-methyl-2-cyano-2-(1'-oxo-3'-cyclohexyl)-3-ethyl-3-piperideine
1-methyl-2-cyano-2-methyl-3-ethyl-4-thiophenylpiperidine