6-[(3-{[N,N'-bis[(1,1-dimethylethoxy)carbonyl]aminoiminomethyl]amino}hexyl)oxy]-3,4-dihydro-1-oxo-2(1H)-isoquinolineacetic acid 1,1-dimethylethyl ester

6-[(3-{[N,N'-bis[(1,1-dimethylethoxy)carbonyl]aminoiminomethyl]amino}pentyl)oxy]-3,4-dihydro-1-oxo-2(1H)-isoquinolineacetic acid 1,1-dimethylethyl ester

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

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