| 4-(2-((o-methoxyphenyl)phenylmethoxy)ethyl)-1-piperazinepropionic aci dimal |
| 1-(2-((2-methoxybenzhydryl)oxy)ethyl)-4-(2-carboxyethyl)piperazine dimaleate |
| 4-(2-((2-methoxyphenyl)phenylmethoxy)ethyl)-1-piperazinepropanoic aci (z) |
| 4-(2-((o-methoxyphenyl)phenylmethoxy)ethyl)-1-piperazinepropionic aci dimaleate |
