Using CSSC, CC(C)(C)C(=O)OCn1cnc2c(Cl)nc(N)nc21 to produce CSc1nc(Cl)c2ncn(COC(=O)C(C)(C)C)c2n1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.