Using CCOC(=O)C(=NOC(CC)CNC(=O)OC(C)(C)C)c1csc(NC=O)n1 to produce CCC(CNC(=O)OC(C)(C)C)ON=C(C(=O)O)c1csc(NC=O)n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.