alkaloid

The Aspidosperma alkaloids are the largest group of indole alkaloids.

Xanthosine, the initial substrate of purine alkaloid synthesis, is supplied by at least four different pathways […]

Daffodils contain a toxic alkaloid that may even be lethal when ingested in high quantities.

For several weeks, scientists exposed a group of rats to cocaine, an alkaloid derived from the coca plant that's used widely—and illegally—as a drug.

Morphine, an alkaloid found in opium, has powerful analgesic properties.

Jason isolated a new alkaloid from the plant's roots.