18850
As a part of our ongoing effort to identify anti - diabetic constituents from natural sources , we examined the inhibitory activity of the methanol extracts of 12 species of the genus Artemisia , against alpha - glucosidase and protein tyrosine phosphatase 1B ( PTP1B ) .
 methanol, tyrosine
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 methanol, tyrosine