16380
To induce identical adduct concentrations , an approximately 100 - 200 - fold higher dose of P2NA was necessary compared to 2NA .
 Chemical: P2NA; Chemical: 2NA
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: P2NA; Chemical: 2NA