13581
The possible antimutagenic potential of A7G was examined against mutagens ethyl methanesulfonate and acridine in an eukaryotic cell system Saccharomyces cerevisiae and sodium azide in Salmonella typhimurium TA1535 and 9 - aminoacridine in S . typhimurium TA1537 .
 Chemical: A7G; Chemical: ethyl methanesulfonate; Chemical: acridine; Chemical: sodium azide; Chemical: 9 - aminoacridine
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: A7G; Chemical: ethyl methanesulfonate; Chemical: acridine; Chemical: sodium azide; Chemical: 9 - aminoacridine