1. 
   ketopentose
   A five-carbon sugar in which carbons 2, 3, or 4 make up part of a carbonyl group; e.g., ribulose. ... (05 Mar 2000) ...
   Found op http://www.mondofacto.com/facts/dictionary?ketopentose
   
   
2. 
   ketopentose
   Type: Term Pronunciation: kē′tō-pen′tōs Definitions: 1. A five-carbon sugar in which carbons 2, 3, or 4 make up part of a carbonyl group, ribulose.
   Found op http://www.medilexicon.com/medicaldictionary.php?t=47002
   
   

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