16825
9 - ( 5 - O - alpha - D - galactopyranosyl ) - D - arabinityl - 1 , 3 , 7 - trihydropurine - 2 , 6 , 8 - trione ( 1 ) was designed and synthesized as a nonionic inhibitor for the donor binding site of human blood group B galactosyltransferase ( GTB ) .
 Chemical: 9 - ( 5 - O - alpha - D - galactopyranosyl ) - D - arabinityl - 1 , 3 , 7 - trihydropurine - 2 , 6 , 8 - trione
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: 9 - ( 5 - O - alpha - D - galactopyranosyl ) - D - arabinityl - 1 , 3 , 7 - trihydropurine - 2 , 6 , 8 - trione