Using COc1ccc(COc2cccnc2C2Cc3ccc(OC)cc3C(C)(C)C2=O)cc1 to produce COc1ccc2c(c1)C(C)(C)c1oc3cccnc3c1C2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.