8240
The alkaloids induced apoptosis in MDR cells which was accompanied by an activation of caspase - 3 , - 8 , - 6 / 9 , and phosphatidyl serine ( PS ) exposure .
 Chemical: phosphatidyl serine
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: phosphatidyl serine