Using [I-], O=c1c2c(ncn2CCCCl)c2cccnc2n1-c1ccccc1 to produce O=c1c2c(ncn2CCCI)c2cccnc2n1-c1ccccc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.