Using aceticanhydride, (6R,9aR)-6-methyl-1,3,6,7,8,9,9a,10-octahydrofuro[3'',4'':5',6']pyrido[3',2':4,5]pyrrolo[1,2-a]pyrazine to produce 1-((6R,9aR)-6-methyl-3,6,7,9,9a,10-hexahydrofuro[3'',4'':5',6']pyrido[3',2':4,5]pyrrolo[1,2-a]pyrazin-8(1H)-yl)ethan-1-one, 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"
    ]
}
```
