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reticuline

n. (context organic compound English) An alkaloid found in opium.

Wikipedia
Reticuline

Reticuline is a chemical compound found in a variety of plants including Lindera aggregata, Annona squamosa, and Ocotea fasciculata (also known as Ocotea duckei). It is based on the benzylisoquinoline structure.

Reticuline is one of the alkaloids found in opium, and experiments in rodents suggest it possesses potent central nervous system depressing effects. It is the precursor of morphine and many other alkaloids.