Using O=C(Nc1cn(C(c2ccccc2)(c2ccccc2)c2ccccc2)cn1)c1ccccc1 to produce c1ccc(CNc2cn(C(c3ccccc3)(c3ccccc3)c3ccccc3)cn2)cc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.