Using cyanate, 3-(4-aminobutyl)-2-(mesitylimino)-9,10-dimethoxy-2,3,6,7-tetrahydro-4H-pyrimido[6,1-a]isoquinolin-4-one to produce 1-(4-(2-(mesitylimino)-9,10-dimethoxy-4-oxo-6,7-dihydro-2H-pyrimido[6,1-a]isoquinolin-3(4H)-yl)butyl)urea, 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"
    ]
}
```
