Using CCN=C=NCCCN(C)C, CSc1sc(C(=O)O)c2c1C(=O)CC(C)(C)C2 to produce CSc1sc(C(=O)N2CCCC2)c2c1C(=O)CC(C)(C)C2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.