Using O=Cc1cccnc1, CC1(c2ccc3cc(Br)ccc3c2)OCCO1 to produce CC1(c2ccc3cc(C(O)c4cccnc4)ccc3c2)OCCO1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.