Using CC(=O)OC(C)=O, CCOC(=O)C(CS)Cc1cnc(NC(=O)OC(C)(C)C)c(CO)c1 to produce CCOC(=O)C(CSC(C)=O)Cc1cnc(NC(=O)OC(C)(C)C)c(CO)c1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.