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Together , these results led us to hypothesize that VPA and SAHA may interact synergistically with CDK inhibitors such as PD - 033299 .
 Chemical: VPA; Chemical: SAHA; Chemical: PD - 033299
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: VPA; Chemical: SAHA; Chemical: PD - 033299