3620
The results demonstrated that beta - ionone - induced apoptosis in a dose - dependent manner in SGC - 7901 cells treated with beta - ionone ( 25 , 50 , 100 and 200 mu mol / L ) for 24 h .
 Chemical: beta - ionone; Chemical: beta - ionone
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: beta - ionone; Chemical: beta - ionone