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Here we will show that 7b - HC increases cell cycle time and that it changes the affinity of pyruvate kinase to its substrate , phosphoenol pyruvate .
 7b - HC, pyruvate, phosphoenol pyruvate
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 7b - HC, pyruvate, phosphoenol pyruvate