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In HCT116 , HT29 and DLD - 1 cells , PPIX treatment directly hindered the binding between HSP90 and HIF - 1 alpha ; PPIX treatment inhibited the chaperone activity of HSP90 , accelerating protein degradation of HIF - 1 alpha .
 Chemical: PPIX; Chemical: PPIX
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: PPIX; Chemical: PPIX