4331
Furthermore , ROS scavengers , N - acetylcystine ( NAC ) , and glutathione ethyl ester ( GEE ) , reduced helenalin - induced apoptosis .
 Chemical: N - acetylcystine; Chemical: NAC; Chemical: glutathione ethyl ester; Chemical: GEE; Chemical: helenalin
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: N - acetylcystine; Chemical: NAC; Chemical: glutathione ethyl ester; Chemical: GEE; Chemical: helenalin