Using CCOC(=O)/C=C/c1cc(Cl)ccc1[C@@H](C)OC[C@H]1CO1 to produce CCOC(=O)CCc1cc(Cl)ccc1[C@@H](C)OC[C@H]1CO1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.