19872
Diarylheptanoids 1 , 2 , 5 , 13 , and 14 at a concentration of 1 micro g / mL decreased the frequency of micronuclei by 52 . 8 % , 43 . 8 % , 63 . 6 % , 44 . 4 % , and 56 . 0 % , respectively , exerting a much stronger effect than the synthetic protector amifostine ( 17 . 2 % , c = 1 micro g / mL ) .
 Chemical: Diarylheptanoids; Chemical: amifostine
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: Diarylheptanoids; Chemical: amifostine