Using (R)-3-(2-amino-4-methylpentyl)-5-(2-chloro-3-methoxyphenyl)-1-(2-fluoro-6-(trifluoromethyl)benzyl)pyrimidine-2,4(1H,3H)-dione, ethyl 4-bromobutanoate to produce ethyl (R)-4-((1-(5-(2-chloro-3-methoxyphenyl)-3-(2-fluoro-6-(trifluoromethyl)benzyl)-2,6-dioxo-3,6-dihydropyrimidin-1(2H)-yl)-4-methylpentan-2-yl)amino)butanoate, 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"
    ]
}
```
