21503
In this proof - of - concept study , we introduced a 3 - amino - 4 - piperazinylphenyl functionality to the chromone scaffold and evaluated the antiviral activities of the resulting chromone derivatives .
 Chemical: 3 - amino - 4 - piperazinylphenyl; Chemical: chromone; Chemical: chromone
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: 3 - amino - 4 - piperazinylphenyl; Chemical: chromone; Chemical: chromone