4-[2-(2-tert-Butoxycarbonylmethyl-1-oxo-1,2,3,4-tetrahydro-isoquinolin-6-yloxy)-ethyl]-piperidine-1-carboxylic acid tert-butyl ester

{6-[4-(1,3-Dioxo-1,3-dihydro-isoindol-2-ylmethyl)-benzyloxy]-1-oxo-3,4-dihydro-1H-isoquinolin-2-yl}-acetic acid tert-butyl ester

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

2-tert-Butoxycarbonylmethyl-1-oxo-1,2,3,4-tetrahydro-isoquinoline-6-carboxylic acid methyl ester

{6-[3-(1,3-Dioxo-1,3-dihydro-isoindol-2-yl)-propoxy]-1-oxo-3,4-dihydro-1H-isoquinolin-2-yl}-acetic acid tert-butyl ester