Using CC(=O)OCCBr, Cc1c(-c2ccc3sc(=O)[nH]c3c2)nc2ccccn12 to produce CC(=O)OCCn1c(=O)sc2ccc(-c3nc4ccccn4c3C)cc21, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.