Using COC(=O)[C@@H]1CS[C@H]2C[C@@](CO[Si](C)(C)C(C)(C)C)(NC(=O)OC(C)(C)C)C(=O)N21 to produce COC(=O)[C@@H]1CS[C@H]2C[C@@](CO)(NC(=O)OC(C)(C)C)C(=O)N21, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.