18795
The presence of a basic functional group or a quaternary ammonium substituent on the 6 - phenylnaphthalene was required for significant antibacterial activity .
 Chemical: quaternary ammonium; Chemical: 6 - phenylnaphthalene
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: quaternary ammonium; Chemical: 6 - phenylnaphthalene