Using 3-(1,3-dimethyl-2,4-dioxo-5-phenyl-1,2,3,4-tetrahydro-6H-pyrrolo[3,4-d]pyrimidin-6-yl)propanoic acid to produce 1,3-dimethyl-5-phenyl-7,8-dihydro-2H-pyrimido[4,5-a]pyrrolizine-2,4,9(1H,3H)-trione, 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"
    ]
}
```
