tert-butyl 3-{[(2H-1,3-benzodioxol-5-yl)methyl]amino}-2-methylpropanoate

tert-butyl 3-[(3-ethoxypropyl)amino]-2-methylpropanoate

tert-butyl 2-methyl-3-(methylamino)propanoate

tert-butyl 3-{[3-(diethylamino)propyl]amino}-2-methylpropanoate

methyl 3-{[2-(piperidin-1-yl)ethyl]amino}butanoate

methyl 3-(hexylamino)-2-methylpropanoate

methyl 2-methyl-3-(pentylamino)propanoate

methyl 3-{[(pyridin-3-yl)methyl]amino}butanoate

methyl 3-{[(4-fluorophenyl)methyl]amino}-2-methylpropanoate

methyl 3-{[(2-methoxyphenyl)methyl]amino}butanoate

methyl 3-{[(2-chlorophenyl)methyl]amino}butanoate