((1-methyl-1H-pyrazol-4-yl)methyl)proline

((1-methyl-1H-pyrrol-2-yl)methyl)proline

(pyridin-2-ylmethyl)proline

benzylproline

((tetrahydrofuran-3-yl)methyl)proline

((1H-imidazol-4-yl)methyl)proline

(2-ethynylbenzyl)-L-proline

(cyclopropylmethyl)-L-proline

((1-(tert-butoxycarbonyl)piperidin-4-yl)methyl)-L-proline

(cyclohexylmethyl)-L-proline

(4-iodobenzyl)-L-proline

((9-ethyl-9H-carbazol-3-yl)methyl)-L-proline

(2-(benzyloxy)benzyl)-L-proline

(anthracen-9-ylmethyl)-L-proline

(4-(4-methylpiperazin-1-yl)benzyl)-L-proline

((1-benzylpiperidin-4-yl)methyl)-L-proline