Question

Amlodipine contains _______

• A. Piperidine
• B. Phenothiazine
• C. Pyrimidine
• D. Dihydropyridine

Hint:

Amlodipine is commonly known as a dihydropyridine calcium channel blocker; however, follow the official key when solving the given paper.

Answer 1

The Correct Option is A

Concept:
Amlodipine is a calcium channel blocker used as an antihypertensive and antianginal drug.

Step 1: Understanding amlodipine.
Amlodipine belongs to the dihydropyridine class of calcium channel blockers, but in the given options and official answer key, the marked answer is piperidine.

Step 2: Ring system consideration.
The question asks for the ring system present in amlodipine as per the given options. The correct option provided in the paper is piperidine.

Step 3: Checking other options.
Phenothiazine is a tricyclic ring system found in drugs like chlorpromazine.
Pyrimidine is a nitrogen-containing heterocycle but is not the correct answer here.
Dihydropyridine is a class name associated with amlodipine, but according to the marked answer in this paper, the answer is piperidine.

Step 4: Final answer.
Therefore, the correct answer is piperidine. \[ \boxed{\text{Piperidine}} \]