Alfalfa
Astragalus
Legume

Fabaceae (pea)
Leguminosae (bean)

Compounds identified in astragalus include polysaccharides, saponins, flavonoids, isoflavonoids, sterols, amino acids (including gamma-aminobutyric acid), volatile oils, and other mineral elements.

The polysaccharides include the astragalans and astraglucans and are of primary interest along with the triterpene saponin astragalosides. The flavones kaempferol and quercetin and isoflavones, isoflavonones, and pterocarpans are also of interest. The saponin astragaloside intravenous (IV) has been used as a marker for quality assurance of astragalus products.

https://www.drugs.com/npp/astragalus.html

https://link.springer.com/chapter/10.1007/978-3-7091-6496-9_1

https://poisonousplants.ansci.cornell.edu/toxicagents/saponin.html

triterpene saponin
steroidal alfalfa

Saponins Soap Lungs

https://en.m.wikipedia.org/wiki/Triterpene