20450
Three [ 17 ( 20 ) E ] - pregna - 5 , 17 ( 20 ) - dien - 21 - oyl amides at a concentrations of 5 mu M inhibited sterol biosynthesis and stimulated triglyceride biosynthesis ; their regulatory potency was dependent on the structure of amide moiety ; the isomeric [ 17 ( 20 ) Z ] - pregna - 5 , 17 ( 20 ) - dien - 21 - oyl amides were inactive .
 [ 17 ( 20 ) E ] - pregna - 5 , 17 ( 20 ) - dien - 21 - oyl amides, triglyceride, amide, [ 17 ( 20 ) Z ] - pregna - 5 , 17 ( 20 ) - dien - 21 - oyl amides
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 [ 17 ( 20 ) E ] - pregna - 5 , 17 ( 20 ) - dien - 21 - oyl amides, triglyceride, amide, [ 17 ( 20 ) Z ] - pregna - 5 , 17 ( 20 ) - dien - 21 - oyl amides