Using 1'-(tert-butyl) 1-(2-(trimethylsilyl)ethyl) 5-(3-bromo-2-(bromomethyl)propyl)spiro[indoline-3,3'-pyrrolidine]-1,1'-dicarboxylate, diethyl propanedioate to produce 1'-(tert-butyl) 1-(2-(trimethylsilyl)ethyl) 5-((3,3-bis(ethoxycarbonyl)cyclobutyl)methyl)spiro[indoline-3,3'-pyrrolidine]-1,1'-dicarboxylate, 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"
    ]
}
```
