Question:medium
The below structure represent the drug:
The below structure represent the drug:
Updated On: Jul 14, 2026
- Isoprenaline
- Amphetamine
- Norepinephrine
- Salbutamol
Show Solution
The Correct Option is A
Solution and Explanation
Step 1: Understanding the Question:
The structure given has to be identified among four related sympathomimetic amines that are often confused because they share a similar phenylethylamine backbone.
Step 2: Key Concept:
Two structural markers separate all four drugs from each other: whether the ring keeps an intact catechol (two adjacent hydroxyl groups) or a modified substitution, and what group sits on the amine nitrogen, hydrogen, methyl, isopropyl, or tert-butyl.
Step 3: Detailed Explanation:
Norepinephrine keeps the catechol ring but has an unsubstituted, primary amine. Amphetamine has neither ring hydroxyls nor a beta-hydroxyl side chain. Salbutamol swaps one ring hydroxyl for a hydroxymethyl group and carries a tert-butyl amine. Isoprenaline alone keeps the full catechol ring and places an isopropyl group on the nitrogen, which is the exact combination shown in the structure.
Step 4: Final Answer:
The drug shown is Isoprenaline.
The structure given has to be identified among four related sympathomimetic amines that are often confused because they share a similar phenylethylamine backbone.
Step 2: Key Concept:
Two structural markers separate all four drugs from each other: whether the ring keeps an intact catechol (two adjacent hydroxyl groups) or a modified substitution, and what group sits on the amine nitrogen, hydrogen, methyl, isopropyl, or tert-butyl.
Step 3: Detailed Explanation:
Norepinephrine keeps the catechol ring but has an unsubstituted, primary amine. Amphetamine has neither ring hydroxyls nor a beta-hydroxyl side chain. Salbutamol swaps one ring hydroxyl for a hydroxymethyl group and carries a tert-butyl amine. Isoprenaline alone keeps the full catechol ring and places an isopropyl group on the nitrogen, which is the exact combination shown in the structure.
Step 4: Final Answer:
The drug shown is Isoprenaline.
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