Question

The ring structure present in strygchnine alkaloid is____.

• A. Indole
• B. Purine
• C. Phenanthrene
• D. Imidazole

Answer 1

The Correct Option is A

The question asks to identify the ring structure present in the strychnine alkaloid. Strychnine is a well-known alkaloid extracted from the seeds of the Strychnos nux-vomica tree and is used primarily as a pesticide.

To solve this question, we need to know the chemical structure of strychnine. Understanding how these ring systems are categorized is essential to identifying which ring structure is correct.

• Indole: The indole structure consists of a six-membered benzene ring fused to a five-membered nitrogen-containing pyrrole ring. Strychnine contains an indole core as part of its complex fused ring system.
• Purine: Composed of a pyrimidine ring fused to an imidazole ring. It is not present in strychnine.
• Phenanthrene: Composed of three fused benzene rings. It does not match strychnine’s structure.
• Imidazole: A five-membered ring containing two nitrogen atoms at non-adjacent positions. This is not a defining part of the strychnine structure.

The correct answer is Indole because the strychnine molecule includes an indole moiety as part of its complex structure.

Thus, the correct option is Indole.

In conclusion, by understanding the ring structures present in various organic compounds, it is evident that strychnine is characterized by its indole ring structure. This knowledge is essential for categorizing and understanding the biochemical interactions and properties of such alkaloids.