Using CCOC(=O)c1ccc(NC(=O)c2ccc3c(c2)SCCC3(C)C)cc1 to produce CC1(C)CCSc2cc(C(=O)Nc3ccc(C(=O)O)cc3)ccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.