18793
Based upon their structural similarity to these compounds , a distinct series of substituted 1 , 6 - diphenylnaphthalenes were synthesized and evaluated for antibacterial activity against Staphylococcus aureus and Enterococcus faecalis .
 Chemical: 1 , 6 - diphenylnaphthalenes
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: 1 , 6 - diphenylnaphthalenes