[
    {
        "medium_id": "J66",
        "compound": "Agar",
        "g_l": 15,
        "mmol_l": 44.5991,
        "optional": "no"
    },
    {
        "medium_id": "J66",
        "compound": "CaCO3",
        "g_l": 3,
        "mmol_l": 29.973,
        "optional": "no"
    },
    {
        "medium_id": "J66",
        "compound": "V8 canned vegetable juice",
        "g_l": null,
        "mmol_l": null,
        "optional": "no"
    },
    {
        "medium_id": "J66",
        "compound": "Distilled water",
        "g_l": null,
        "mmol_l": null,
        "optional": "no"
    }
]