27795
Promoter assay revealed that prunetin inhibits LPS - induced nitric oxide and prostaglandin E2 production through the suppression of iNOS and COX - 2 at the transcriptional level .
 Chemical: prunetin; Chemical: nitric oxide; Chemical: prostaglandin E2
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities: prunetin, nitric oxide, prostaglandin E2 
Answer:
 Chemical: prunetin; Chemical: nitric oxide; Chemical: prostaglandin E2