Using CSc1ccc(C(=O)c2c(C)cc3n2CCC3C(=O)OC(C)c2ccccc2)n1C to produce CCOC(=O)C1CCn2c1cc(C)c2C(=O)c1ccc(SC)n1C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.