Which category includes substances derived from tryptophan?

Which category includes substances derived from tryptophan?

• A. Tropane alkaloids
• B. Quinolone alkaloids
• C. Indole alkaloids
• D. Piperidine alkaloids

Answer: (C)

Substances derived from tryptophan form the indole alkaloids family. Tryptophan provides the indole ring, and through decarboxylation to tryptamine followed by further biosynthetic steps, plants assemble a wide range of alkaloids that all feature that indole structure. That shared origin is what ties these compounds together as indole alkaloids. By contrast, tropane alkaloids come from different precursors and form a tropane skeleton, piperidine alkaloids originate from lysine, and quinolone alkaloids have a distinct ring system not derived from tryptophan.

Substances derived from tryptophan form the indole alkaloids family. Tryptophan provides the indole ring, and through decarboxylation to tryptamine followed by further biosynthetic steps, plants assemble a wide range of alkaloids that all feature that indole structure. That shared origin is what ties these compounds together as indole alkaloids. By contrast, tropane alkaloids come from different precursors and form a tropane skeleton, piperidine alkaloids originate from lysine, and quinolone alkaloids have a distinct ring system not derived from tryptophan.