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A series of 7 , 8 - dehydrorutaecarpine derivatives were synthesized and characterized as potential multifunctional agents for treatment of Alzheimer ' s disease ( AD ) .
 Chemical: 7 , 8 - dehydrorutaecarpine
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: 7 , 8 - dehydrorutaecarpine