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Brucine was found to possess antitumor activity in a concentration and time - dependent manner and gastrointestinal tumor cells seemed to be more sensitive to brucine .
 Chemical: Brucine; Chemical: brucine
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: Brucine; Chemical: brucine