Using COc1cc(-c2nnc3n2CCCC3c2ccc(Cl)c(Cl)c2)ccc1-c1cnc(C)o1, C=O to produce COc1cc(-c2nnc3n2CCCC3(CO)c2ccc(Cl)c(Cl)c2)ccc1-c1cnc(C)o1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.