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Acyclic nucleoside phosphonates ( ANPs ) that contain a 6 - oxopurine base are good inhibitors of the Plasmodium falciparum ( Pf ) and Plasmodium vivax ( Pv ) 6 - oxopurine phosphoribosyltransferases ( PRTs ) .
 Chemical: Acyclic nucleoside phosphonates; Chemical: ANPs; Chemical: 6 - oxopurine; Chemical: 6 - oxopurine
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: Acyclic nucleoside phosphonates; Chemical: ANPs; Chemical: 6 - oxopurine; Chemical: 6 - oxopurine