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LC - MS analysis demonstrated that betulin could be transformed into at least five products from cultured C . blakesleeana cells , among which betulinic acid was the most important .
 Chemical: betulin; Chemical: betulinic 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: betulin; Chemical: betulinic acid