[
    {
        "id": 139,
        "name": "Nicotinic acid",
        "group": "Nicotinic acid",
        "chebi_id": 15940,
        "cas": "59-67-6",
        "kegg_id": "C00253",
        "mass": 123.11,
        "formula": "C6H5NO2",
        "density": null,
        "biological roles": null
    }
]