How do I connect my potion-command to my villager's trading-system? [duplicate]

So I've got this command:

/summon Villager ~1 ~ ~ {
    Profession: 2,
    CustomName: "Aldorf the wizzard",
    CustomNameVisible: 1,
    Career: 1,
    CareerLevel: 42,
    PersistenceRequired: 1,
    Silent: 1,
    Invulnerable: 1,
    Attributes: [
        {
            Name: "generic.maxHealth",
            Base: 99999
        }
    ],
    Offers: {
        Recipes: [
            {
                buy: {
                    id: "record_13",
                    Count: 1
                },
                buyB: {
                    id: "skull",
                    Count: 1,
                    Damage: 1
                },
                maxUses: 9999999,
                sell: {
                    id: "stone",
                    Count: null
                }
            }
        ]
    }
}

And you can see it says "stone" (null).

Now I want to change it so that I can trade from the disc and the skull (that are already there) into this custom potion:

/give @p potion 1 16385 {CustomPotionEffects:[{Id:3,Amplifier:0,Duration:60},{Id:7,Amplifier:0,Duration:60},{Id:9,Amplifier:0,Duration:120},{Id:10,Amplifier:0,Duration:60},{Id:14,Amplifier:0,Duration:20},{Id:15,Amplifier:0,Duration:140},{Id:16,Amplifier:0,Duration:600},{Id:17,Amplifier:500,Duration:600},{Id:18,Amplifier:9,Duration:600},{Id:19,Amplifier:100,Duration:600},{Id:20,Amplifier:100,Duration:200},{Id:23,Amplifier:500,Duration:600}],display:{Name:"Poison",Lore:["Poisons anyone it is used to.","The only way to survive is to drink milk in seconds."]}}

How do I connect them? I almost got it but there are these weird "]}}" signs at the end so I couldn't do it.