Using O=P([O-])([O-])[O-], CCCC1CC(=O)N(Cc2c(-c3ccccc3)nn3cc(Br)cnc23)C1 to produce CCCC1CC(=O)N(Cc2c(-c3ccccc3)nn3cc(O)cnc23)C1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.