Amine-Acid Linkers

2-(4-{1-[(tert-butoxy)carbonyl]piperidin-4-yl}piperazin-1-yl)acetic acid

2-[4-(2-{[(tert-butoxy)carbonyl]amino}ethyl)piperazin-1-yl]acetic acid

2-[4-({4-[(tert-butoxy)carbonyl]piperazin-1-yl}methyl)piperidin-1-yl]acetic acid

2-{4-[(tert-butoxy)carbonyl]piperazin-1-yl}acetic acid

3-(4-{1-[(tert-butoxy)carbonyl]piperidin-4-yl}piperazin-1-yl)propanoic acid

3-[4-(2-{[(tert-butoxy)carbonyl]amino}ethyl)piperazin-1-yl]propanoic acid

3-{4-[(tert-butoxy)carbonyl]piperazin-1-yl}propanoic acid

4-{4-[(tert-butoxy)carbonyl]piperazin-1-yl}butanoic acid

tert-butyl 2-(piperazin-1-yl)acetate

tert-butyl 2-[4-(2-aminoethyl)piperazin-1-yl]acetate

tert-butyl 2-[4-(piperazin-1-yl)piperidin-1-yl]acetate

tert-butyl 2-[4-(piperidin-4-yl)piperazin-1-yl]acetate

tert-butyl 2-{4-[(piperidin-4-yl)methyl]piperazin-1-yl}acetate

tert-butyl 2-{4-[2-(2-aminoethoxy)ethyl]piperazin-1-yl}acetate

tert-butyl 2-{4-[2-(piperazin-1-yl)ethyl]piperazin-1-yl}acetate

tert-butyl 3-(piperazin-1-yl)propanoate

tert-butyl 3-[2-(piperazin-1-yl)ethoxy]propanoate

tert-butyl 3-[4-(piperidin-4-yl)piperazin-1-yl]propanoate

tert-butyl 4-(piperazin-1-yl)butanoate