3-[6-(4-Cyano-benzyloxy)-1-oxo-3,4-dihydro-1H-isoquinolin-2-yl]-4-(2-methoxy-ethoxy)-butyric acid tert-butyl ester 生成 3-[6-(4-Carbamimidoyl-benzyloxy)-1-oxo-3,4-dihydro-1H-isoquinolin-2-yl]-4-(2-methoxy-ethoxy)-butyric acid; compound with trifluoro-acetic acid