Using CCOC(=O)C(OC(C)(C)C)c1c(C)nc2sc3c(c2c1-c1ccc(C)cc1)CCOC3 to produce Cc1ccc(-c2c(C(OC(C)(C)C)C(=O)O)c(C)nc3sc4c(c23)CCOC4)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.