23747
A decrease in ADA activity was observed when the slices were exposed to organoselenium at the concentrations of 1 , 10 and 30 micro M .
 Chemical: organoselenium
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: organoselenium