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