18887
Here , we report in vivo A beta - lowering profiles of a pyridazine and a pyridine - derived GSM : GSM - C ( Wan et al . , 2011a ) and GSM - D ( Wan et al . , 2011b ) .
 Chemical: pyridazine; Chemical: pyridine
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: pyridazine; Chemical: pyridine