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Activation of AMP - activated Protein Kinase and Phosphorylation of Glycogen Synthase Kinase3 beta Mediate Ursolic Acid Induced Apoptosis in HepG2 Liver Cancer Cells .
 Chemical: AMP; Chemical: Ursolic Acid
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: AMP; Chemical: Ursolic Acid