17412
Acyclic nucleoside phosphonates containing a second phosphonate group are potent inhibitors of 6 - oxopurine phosphoribosyltransferases and have antimalarial activity .
 Chemical: Acyclic nucleoside phosphonates; Chemical: phosphonate; 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: phosphonate; Chemical: 6 - oxopurine