Using allyl (2R,4R)-2-(imidazo[5,1-b]thiazol-3-ylmethyl)-4-((methylsulfonyl)oxy)pyrrolidine-1-carboxylate, ethanethioate to produce allyl (2R,4S)-4-(acetylthio)-2-(imidazo[5,1-b]thiazol-3-ylmethyl)pyrrolidine-1-carboxylate, please predict the condition, including solvent and agent in SMILES notation in json format like:

```JSON
{
    "solvent": [
        "CCN(CC)CC",
        "CCOC(C)=O"
    ],
    "agent": [
        "On1nnc2ccccc21",
        "C(=NC1CCCCC1)=NC1CCCCC1",
        "Cl"
    ]
}
```
