Using COc1ccc2c(c1)CC(NCC(O)c1cccc(Cl)c1)CC2 to produce Oc1ccc2c(c1)CC(NCC(O)c1cccc(Cl)c1)CC2, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.