[医] 远志皂甙

Senegin \Sen"e*gin\, n. (Med. Chem.)
A substance extracted from the rootstock of the {Polygala
Senega} (Seneca root), and probably identical with polygalic
acid.

Saponin \Sap"o*nin\, n. [L. sapo, -onis soap: cf. F. saponine.]
(Chem.)
A poisonous glucoside found in many plants, as in the root of
soapwort ({Saponaria}), in the bark of soap bark
({Quillaia}), etc. It is extracted as a white amorphous
powder, which occasions a soapy lather in solution, and
produces a local an[ae]sthesia. Formerly called also
{struthiin}, {quillaiin}, {senegin}, {polygalic acid}, etc.
By extension, any one of a group of related bodies of which
saponin proper is the type.