Using CCOC(=O)c1cc(OCCCCCCOC(C)=O)c(C(=O)OCC)cc1OCCCCCCOC(C)=O to produce O=C(O)c1cc(OCCCCCCO)c(C(=O)O)cc1OCCCCCCO, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.