Using ethyl 4-bromobutanoate, 7a-(4-bromobenzyl)-2-(3,5-dichloro-4-hydroxyphenyl)tetrahydro-1H-pyrrolo[1,2-c]imidazole-1,3(2H)-dione to produce ethyl 4-(4-(7a-(4-bromobenzyl)-1,3-dioxotetrahydro-1H-pyrrolo[1,2-c]imidazol-2(3H)-yl)-2,6-dichlorophenoxy)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"
    ]
}
```
