2748
Here , we show the reduction mechanism of A beta production using the butanol extract of Ecklonia cava through the examination of expression and activity of alpha - , beta - , and gamma - secretase .
 Chemical: butanol
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: butanol