different between saponin vs polygalic

English

sapon- +? -in

saponin (plural saponins)

(organic chemistry, biochemistry) Any of various steroid glycosides found in plant tissues that dissolve in water to give a soapy froth.
- 1985, Wade Davis, The Serpent and the Rainbow, Simon & Schuster, p. 111:
  “Saponins aren't absorbed by the intestines. You've got to get the stuff into the blood.”

Polygala +? -ic

polygalic (not comparable)

(chemistry) Of, pertaining to, or obtained from Polygala; specifically, designating an acrid glucoside (called polygalic acid, senegin, etc.), resembling, or possibly identical with, saponin.

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