Using COCCOCC(CC1(C(=O)N[C@H]2CC[C@@H](C(=O)O)CC2)CCCC1)C(=O)O to produce O=C(O)C(COCCO)CC1(C(=O)N[C@H]2CC[C@@H](C(=O)O)CC2)CCCC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.