Using 4-ethyl 1,1-dimethyl (S)-4-((triethylsilyl)oxy)butane-1,1,4-tricarboxylate, 1-(tetrahydro-2H-pyran-4-yl)guanidine to produce ethyl (S)-4-(4,6-dihydroxy-2-((tetrahydro-2H-pyran-4-yl)amino)pyrimidin-5-yl)-2-hydroxybutanoate, 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"
    ]
}
```
