Using 1-(6-bromo-5-((1,2,3,5,6,8a-hexahydroindolizin-7-yl)methoxy)indolin-1-yl)ethan-1-one to produce 1-(2',3',5',6,6',7,8',8a'-octahydro-1'H,2H,5H-spiro[furo[2,3-f]indole-3,7'-indolizin]-5-yl)ethan-1-one, 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"
    ]
}
```
