Using CC(C)(C)OC(=O)NC[C@H]1CN(c2ccc(N3CCSCC3)cc2)C(=O)O1, CO to produce CC(C)(C)OC(=O)NC[C@H]1CN(c2ccc(N3CCS(=O)CC3)cc2)C(=O)O1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.