Using CC1(C)OCC(CO)O1, O=C(O)Cc1cccc2c(=O)cc(C3=CCCCC3)oc12 to produce CC1(C)OCC(COC(=O)Cc2cccc3c(=O)cc(C4=CCCCC4)oc23)O1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.