21500
Design , Synthesis and Antiviral Activity of 2 - ( 3 - Amino - 4 - piperazinylphenyl ) chromone Derivatives .
 Chemical: 2 - ( 3 - Amino - 4 - piperazinylphenyl ) 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: 2 - ( 3 - Amino - 4 - piperazinylphenyl ) chromone