20527
In order to enhance the bioactivity of this compound , chemical modification of 1 to the dihydro analog , ent - 16 beta - hydroxybeyeran - 19 - oic acid ( 2 ) , was undertaken .
 Chemical: ent - 16 beta - hydroxybeyeran - 19 - oic acid
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: ent - 16 beta - hydroxybeyeran - 19 - oic acid