21504
The synthesized 2 - ( 3 - amino - 4 - piperazinylphenyl ) - chromones showed severe acute respiratory syndrome - corona virus ( SARS - CoV ) - specific antiviral activity .
 Chemical: 2 - ( 3 - amino - 4 - piperazinylphenyl ) - chromones
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
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Answer:
 Chemical: 2 - ( 3 - amino - 4 - piperazinylphenyl ) - chromones