{1-Oxo-6-[(E)-2-(4-thiocarbamoyl-phenyl)-vinyl]-3,4-dihydro-1H-isoquinolin-2-yl}-acetic acid tert-butyl ester

{6-[(E)-2-(4-Carbamimidoyl-phenyl)-vinyl]-1-oxo-3,4-dihydro-1H-isoquinolin-2-yl}-acetic acid tert-butyl ester

[6-(4-Carbamimidoyl-benzyloxy)-1-oxo-3,4-dihydro-1H-isoquinolin-2-yl]-acetic acid tert-butyl ester

[1-Oxo-6-(4-thiocarbamoyl-phenylethynyl)-3,4-dihydro-1H-isoquinolin-2-yl]-acetic acid tert-butyl ester

{1-Oxo-6-[2-(4-thiocarbamoyl-phenyl)-ethoxy]-3,4-dihydro-1H-isoquinolin-2-yl}-acetic acid tert-butyl ester