Using O=S(=O)(c1ccccc1)n1c(C2(O)CCN(Cc3ccccc3)CC2)cc2ccccc21 to produce O=S(=O)(c1ccccc1)n1c(C2=CCN(Cc3ccccc3)CC2)cc2ccccc21, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.