8578
While cycloheximide was shown to increase activities of MEK1 and JNK , signaling was demonstrated to be inhibited by pretreatment with either MEK1 inhibitors U0126 and PD98059 , or with the JNK inhibitor SP600125 .
 cycloheximide, U0126, PD98059, SP600125
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 cycloheximide, U0126, PD98059, SP600125