Deliver the Nightshade Extract to Wuunferth the Unliving

Walkthrough
This is one of several Delivery quests. If the Dragonborn speaks with Hillevi Cruel-Sea at her market stall in Windhelm and asks about her farm, she will mention that she grows Nightshade and ask the Dragonborn to deliver some Nightshade Extract to Wuunferth the Unliving at the Palace of the Kings.

Deliver the Nightshade Extract to Wuunferth the Unliving
Make it so, receive.

Bringe Tollkirschenextrakt zu Wuunferth der Unlebendige