Using Cc1nn(C2CCNCC2)cc1-c1cnc(N)c(-c2nc3ccccc3o2)c1, C=O to produce Cc1nn(C2CCN(C)CC2)cc1-c1cnc(N)c(-c2nc3ccccc3o2)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.