Discussion
Which of the following compounds is an alkaloid ?
Answer: A
The alkaloid is morphine.
Alkaloids are naturally occurring, mostly plant-derived compounds containing basic nitrogen, usually in a heterocyclic ring, and they typically have strong physiological effects. Morphine, from the opium poppy, has a tertiary amine nitrogen in its pentacyclic skeleton and is the classic example.
The other three contain no nitrogen. Tocopherol (vitamin E) is a chromanol with a long isoprenoid side chain, and carvone (in spearmint and caraway oils) and camphor are monoterpene ketones.
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