12208
These compounds were extensively studied as bioactive compounds and many of them are known to be biologically and medicinally useful molecules , such as anti - HIV agents , antimalarial agents , antagonist agents , anticancer agents , and PARP - 1 inhibitors .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
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