3791
The first crystal structure of human telomeric DNA in complex with the natural alkaloid berberine , produced by different plant families and used in folk medicine for millennia , was solved by X - ray diffraction method .
 Chemical: berberine
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: berberine