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A simple GC - MS method for the screening of betulinic , corosolic , maslinic , oleanolic and ursolic acid contents in commercial botanicals used as food supplement ingredients .
 Chemical: betulinic , corosolic , maslinic , oleanolic and ursolic 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: betulinic , corosolic , maslinic , oleanolic and ursolic acid