Using O=C=O, CCNc1cc2ccc(OC)c(OC)c2c2cc(C)ccc12 to produce CCN1C(=O)c2cc(C)cc3c2c1cc1ccc(OC)c(OC)c13, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.