(4-(1H-imidazol-1-yl)benzyl)-L-proline

((2-hydroxynaphthalen-1-yl)methyl)-L-proline

(2-hydroxy-5-nitrobenzyl)-L-proline

(2,4-dimethoxybenzyl)-L-proline

(3-ethoxy-4-hydroxybenzyl)-L-proline

(3,4-dimethoxybenzyl)-L-proline

((2,3-dihydrobenzo[b][1,4]dioxin-6-yl)methyl)-L-proline

(benzo[b]thiophen-2-ylmethyl)-L-proline

(4-(prop-2-yn-1-yloxy)benzyl)-L-proline

((1-methyl-1H-indol-3-yl)methyl)-L-proline

((5-chloro-1,3-dimethyl-1H-pyrazol-4-yl)methyl)-L-proline

(2,6-difluoro-4-hydroxybenzyl)-L-proline

(quinolin-2-ylmethyl)-L-proline

(3-chloro-4-hydroxybenzyl)-L-proline

(5-chloro-2-hydroxybenzyl)-L-proline

(2-hydroxy-4-methoxybenzyl)-L-proline