6-amino-3,4-dihydro-1-oxo-2(1H)-isoquinolineacetic acid 1,1-dimethylethyl ester

(6-Isocyanato-1-oxo-3,4-dihydro-1H-isoquinolin-2-yl)-acetic acid tert-butyl ester

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

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

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