(a) Name the category of drugs represented by the chemical structure given above.

(b) If the methyl group is substituted by acetyl group we get a bitter crystalline compound. Name the compound.

(c) Name the natural source of these compounds.

(d) State the harmful effects of this class of drugs on the human body.

Correct Answer:
(a) Opioids / Morphine
(b) Diacetylmorphine / Smack
(c) Papaver somniferum / Poppy plant
(d) Slows down body function, act as depressant

Step-by-step Explanation:

(a) Identification of the Chemical Structure and Drug Category:
The chemical structure shown in the image represents Morphine. Key features visible in the diagram include a central phenanthrene skeleton, a furan ring formed by an ether linkage (O), two hydroxyl groups (one phenolic group represented by the top-left HO- and one alcoholic group represented by the bottom-left HO-), and a nitrogen-containing ring with a methyl substituent (N-CH₃). Morphine belongs to the class of drugs known as opioids, which bind to specific opioid receptors present in our central nervous system and gastrointestinal tract.

(b) Acetylation of Morphine:
When morphine undergoes acetylation (specifically, when its two hydroxyl groups are acetylated by reacting with acetic anhydride), it forms diacetylmorphine, commonly known as heroin or smack. Chemically, it is a white, odorless, bitter crystalline compound.

(c) Natural Source of Opioids:
Opioids like morphine are extracted from the latex of the poppy plant, scientifically named Papaver somniferum.

(d) Harmful Effects on the Human Body:
Opioids primarily function as depressants. They slow down overall body functions, reduce heart rate and respiration, and cause drowsiness and pain relief (analgesia), which can lead to severe physical and psychological dependence when abused.