Using O=P(O)(c1ccccc1)c1ccccc1, O=C(CBr)CBr to produce O=C(COP(=O)(c1ccccc1)c1ccccc1)COP(=O)(c1ccccc1)c1ccccc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.