Using O=C(O)CNC(=O)OCc1ccccc1, CC1(C)NCC(=O)N1 to produce CC1(C)NC(=O)CN1C(=O)CNC(=O)OCc1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.