2053
Here , we investigated the effects and mechanisms of acrolein by intravesical instillation on urinary bladder muscle contractions and pathological alterations in rats .
 Chemical: acrolein
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: acrolein