9084
By using this bioassay - oriented approach five proanthocyanindins , including the new natural compounds ( 2S ) - 4 ' , 5 , 7 - trihydroxyflavan - ( 4 beta --> 8 ) - afzelechin ( 1 ) and ( 2S ) - 4 ' , 5 , 7 - trihydroxyflavan - ( 4 beta --> 8 ) - epiafzelechin ( 2 ) and the known geranin B ( 3 ) , proanthocyanidin A2 ( 4 ) , and proanthocyanidin A1 ( 5 ) , were isolated .
 Chemical: proanthocyanindins; Chemical: ( 2S ) - 4 ' , 5 , 7 - trihydroxyflavan - ( 4 beta --> 8 ) - afzelechin; Chemical: ( 2S ) - 4 ' , 5 , 7 - trihydroxyflavan - ( 4 beta --> 8 ) - epiafzelechin; Chemical: geranin B; Chemical: proanthocyanidin A2; Chemical: proanthocyanidin A1
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: proanthocyanindins; Chemical: ( 2S ) - 4 ' , 5 , 7 - trihydroxyflavan - ( 4 beta --> 8 ) - afzelechin; Chemical: ( 2S ) - 4 ' , 5 , 7 - trihydroxyflavan - ( 4 beta --> 8 ) - epiafzelechin; Chemical: geranin B; Chemical: proanthocyanidin A2; Chemical: proanthocyanidin A1