Using CCOC(=O)CBr, Oc1c2ncnc(S)c2nn1-c1ccccc1 to produce CCOC(=O)CSc1ncnc2c(O)n(-c3ccccc3)nc12, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.