Using CCc1nc(/C=C/c2cn(-c3ccccc3)nc2OCOC)c(C)s1 to produce CCc1nc(/C=C/c2cn(-c3ccccc3)nc2O)c(C)s1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.