Using CCOC(=O)c1ccc2c(c1)C=CC(C)(COc1ccc(CC3SC(=O)NC3=O)cc1)O2 to produce CCOC(=O)c1ccc2c(c1)CCC(C)(COc1ccc(CC3SC(=O)NC3=O)cc1)O2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.