Using COCCBr, CC1(C)C(C(=O)Nc2nc3c(s2)CCc2nonc2-3)C1(C)C to produce COCCn1c2c(s/c1=N\C(=O)C1C(C)(C)C1(C)C)CCc1nonc1-2, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.