30160
All of the isolated saponins exhibited the significant activity in a concentration - dependent manner at concentrations of 60 - 200 mu M with the half maximal inhibitory concentration ( IC50 ) values of 70 . 96 +/- 2 . 05 mu M for 1 , 74 . 14 +/- 2 . 65 mu M for 2 , and 79 . 83 +/- 1 . 78 mu M for 3 , respectively , whereas indomethacin had an IC50 of 63 . 75 +/- 3 . 33 mu M as a positive control drug .
 saponins, indomethacin
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 saponins, indomethacin