Using CSC(=NC(=O)OC(C)(C)C)NC(=O)OC(C)(C)C, CI to produce CSC(=NC(=O)OC(C)(C)C)N(C)C(=O)OC(C)(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.