This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Other topics and Adverse effects, Subject name: Anatomy
The only non catecholamine sympathomimetic drug out of the following is 
Select and explain. 
A. Adrenaline, B. Ephedrine, C. Dopamine, D. Isoprenaline
B: Ephedrine
Answer: B: Ephedrine 
Explanation: Ref-Goodman and Gillman 11/e p239 Catecholamine are the drugs having dihydrobenzene nucleus in it's structure.adrenaline, isoprenaline and dopamine contain this structure