16807
The goal of our present study was to evaluate the protective role of a 35kD protein ( PNP ) isolated from this herb against iron - induced cytotoxicity in murine hepatocytes .
 Chemical: iron
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: iron