Using 3-amino-3-methyl-1-(pyrrolidin-1-yl)butan-1-one, (2S,4S)-1-(2-bromoacetyl)-4-fluoropyrrolidine-2-carbonitrile to produce (2S,4S)-4-fluoro-1-((2-methyl-4-oxo-4-(pyrrolidin-1-yl)butan-2-yl)glycyl)pyrrolidine-2-carbonitrile, 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"
    ]
}
```
