Using O=C([O-])[O-], O=S(=O)(c1ccccc1)n1ncc2c(-c3nnc(CCl)o3)cc(-c3cccc4[nH]ccc34)cc21 to produce COCc1nnc(-c2cc(-c3cccc4[nH]ccc34)cc3[nH]ncc23)o1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.