25505
Evn - 50 is a lignan compounds mixture extracted from Vitex negundo , a widely used herb in traditional Chinese medicine .
 Chemical: Evn - 50; Chemical: lignan
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: Evn - 50; Chemical: lignan