Using thiourea, 5-((tert-butyldimethylsilyl)oxy)-1-(2,4-difluoro-5-(pyrimidin-5-yl)phenyl)-2-methylenepentan-1-one to produce (4aS,8aS)-8a-(2,4-difluoro-5-(pyrimidin-5-yl)phenyl)-4a,6,7,8a-tetrahydro-4H,5H-pyrano[2,3-d][1,3]thiazin-2-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"
    ]
}
```
