Using tert-butyl (S)-4-(6-((6-chloroimidazo[1,2-b]pyridazin-8-yl)amino)pyridin-3-yl)-3-methylpiperazine-1-carboxylate to produce (S)-6-bromo-N-(5-(2-methylpiperazin-1-yl)pyridin-2-yl)imidazo[1,2-b]pyridazin-8-amine, 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"
    ]
}
```
