Using C1=COCCC1, CCOC(=O)c1oc(-c2ccc(OC)cc2)nc1CO to produce CCOC(=O)c1oc(-c2ccc(OC)cc2)nc1COC1CCCCO1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.