Using tert-butyl ((2R)-2-(5-bromo-2-(1-((dimethylsilyl)oxy)-2,2,3-trimethylbutyl)-6-methyl-1H-indol-1-yl)propyl)carbamate to produce tert-butyl (R)-8-bromo-4,7-dimethyl-3,4-dihydropyrazino[1,2-a]indole-2(1H)-carboxylate, 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"
    ]
}
```
