Patent ID: 8551426

Claim:
A compound for inhibiting activity of an RNase represented by the following Formula 1 or 2: wherein, in Formula 1 or 2, A is CH or N; R 1 is R 41 or R 42 is each independently hydrogen, a linear or branched (C 1 -C 7 )alkyl, provided that in the case where R 2 or R 4 is R 41 is not hydrogen; R 2 or R 4 is each independently R 3 is a linear or branched (C 1 -C 7 )alkyl; B in the substitute R 2 or R 4 is R 5 to R 9 are each independently hydrogen, linear or branched (C 1 -C 7 )alkyl, carboxylic acid, halogen atoms, cyano, amino, mono- or di(C 1 -C 7 )alkylamino, guanidine, urea or formyl; R 11 , R 12 or R 13 is each independently hydrogen, linear or branched (C 1 -C 7 )alkyl, (C 3 -C 7 )cycloalkyl, (C 3 -C 10 )cycloalkyl(C 1 -C 7 )alkyl, carboxylic acid, halogen atoms, cyano, nitro, amino, mono- or di(C 1 -C 7 )alkylamino, (C 3 -C 7 )cycloalkylamino, morpholine, morpholine oxide, piperazine, piperazine oxide, guanidine, urea, benzyl, benzyloxy or formyl; R 21 is hydrogen or linear or branched (C 1 -C 7 )alkyl; D is O, S or —NR 22 ; R 22 is hydrogen or (C 1 -C 7 )alkyl.