Using CCNCC, CCOC(=O)c1c[nH]c2c1-c1nn(CCOS(C)(=O)=O)cc1CCC2 to produce CCOC(=O)c1c[nH]c2c1-c1nn(CCN(CC)CC)cc1CCC2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.