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Superior antitumor activity of ZnPc / DTX - loaded NPs as compared to DTX - loaded NPs was confirmed in an animal model of orthotopic amelanotic melanoma , thus pointing to the application of PEO - PCL NPs in the combined chemo - photodynamic therapy of cancer .
 Chemical: ZnPc; Chemical: DTX; Chemical: DTX; Chemical: PEO; Chemical: PCL
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: ZnPc; Chemical: DTX; Chemical: DTX; Chemical: PEO; Chemical: PCL