Using CO, CCOC(=O)c1cn2c(-c3cccs3)cnc(N3CCNCC3)c2n1 to produce CCOC(=O)c1cn2c(-c3cccs3)cnc(N3CCN(C)CC3)c2n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.