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In the past pharmacological effects of BSE were mainly attributed to 11 - keto - beta - boswellic acid ( KBA ) and 3 - acetyl - 11 - keto - beta - boswellic acid ( AKBA ) .
 Chemical: 11 - keto - beta - boswellic acid; Chemical: KBA; Chemical: 3 - acetyl - 11 - keto - beta - boswellic acid; Chemical: AKBA
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: 11 - keto - beta - boswellic acid; Chemical: KBA; Chemical: 3 - acetyl - 11 - keto - beta - boswellic acid; Chemical: AKBA