Using ClCC1CO1, COc1cccc2c(=O)c3c(O)cc(O)cc3oc12 to produce COc1cccc2c(=O)c3c(O)cc(OCC4CO4)cc3oc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.