25550
Furthermore , AHS increased the levels of acetylcholine ( Ach ) , but decreased cholinesterase ( AchE ) activity .
 Chemical: acetylcholine; Chemical: Ach
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: acetylcholine; Chemical: Ach