7128
Although HPMA - ZnPP alone had no toxicity in S - 180 tumor - bearing mice , light - irradiation significantly suppressed tumor growth in vivo , similar to the cytotoxicity to HeLa cells in vitro upon endoscopic light - irradiation .
 Chemical: HPMA; Chemical: ZnPP
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: HPMA; Chemical: ZnPP