piperine vs Piper nigrum

piperine and Piper nigrum both are nouns.

Word	Noun	Adjective	Verb	Adverb
piperine	Yes	No	No	No
Piper nigrum	Yes	No	No	No

piperine (noun)	Piper nigrum (noun)
derived from pepper (especially black pepper); source of the hotness of black and white pepper	climber having dark red berries (peppercorns) when fully ripe; southern India and Sri Lanka; naturalized in northern Burma and Assam