Using CC(C)(C)OC(=O)N1CCOS1(=O)=O, CCOC(=O)c1c[nH]c(C(=O)OCC)c1OC to produce CCOC(=O)c1cn(CCNC(=O)OC(C)(C)C)c(C(=O)OCC)c1OC, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.