Using O=C(Nc1ccc2[nH]cc(Br)c2c1)C1(c2ccc3c(c2)OCO3)CC1, OB(O)c1ccccc1 to produce O=C(Nc1ccc2[nH]cc(-c3ccccc3)c2c1)C1(c2ccc3c(c2)OCO3)CC1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.