Using COc1ccc2nccc(C=O)c2n1, CCOC(=O)CC1CCC2(CC1)OCCO2 to produce CCOC(=O)C(C1CCC2(CC1)OCCO2)C(O)c1ccnc2ccc(OC)nc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.