Using CCOC(=O)C1CCc2c1sc(C)c2C(=O)c1ccc(SC)cc1 to produce CSc1ccc(C(=O)c2c(C)sc3c2CCC3C(=O)O)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.