This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pharmacology
All are endogenous catecholamines except : 
Select and explain. 
A. Epinephrine, B. Norepinephrine, C. Dopamine, D. Dobutamine
D: Dobutamine
Answer: D: Dobutamine 
Explanation: Dobutamine ] Catecholamines are compound containing catechol nucleus and a side chain containing amine group.