Using Cc1c(-c2ccncc2)sc(-c2ccncc2)c1CO, CC(C)(C)OC(=O)NOC(=O)OC(C)(C)C to produce Cc1c(-c2ccncc2)sc(-c2ccncc2)c1CN(OC(=O)OC(C)(C)C)C(=O)OC(C)(C)C, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.