| 2'-ethoxy-4-hydroxy-4-phenyl-thio-1-piperidinecarboxanilid |
| 1-((o-ethoxyphenyl)aminothiocarbonyl)-4-hydroxy-4-phenyl piperidine |
| n-(o-ethoxyphenyl)-4-hydroxy-4-phenyl-thio-1-piperidinecarboxamid |
| n-(o-ethoxyphenyl)-4-hydroxy-4-phenyl-thio-1-piperidinecarboxamide |
