[
    {
        "medium_id": "J12",
        "compound": "NaCl",
        "g_l": 5,
        "mmol_l": 85.5578,
        "optional": "no"
    },
    {
        "medium_id": "J12",
        "compound": "Bacto peptone",
        "g_l": 5,
        "mmol_l": null,
        "optional": "no"
    },
    {
        "medium_id": "J12",
        "compound": "Beef extract",
        "g_l": 3,
        "mmol_l": null,
        "optional": "no"
    },
    {
        "medium_id": "J12",
        "compound": "Distilled water",
        "g_l": null,
        "mmol_l": null,
        "optional": "no"
    }
]