11788
The concentration of 19 - epi - OKA that reduced after 24h the maximum neuronal survival ( EC5024 ) by 50 % was ~ 300nM compared with ~ 2nM and ~ 8nM for OKA and dinophysistoxin - 2 , respectively .
 Chemical: 19 - epi - OKA; Chemical: OKA; Chemical: dinophysistoxin - 2
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: 19 - epi - OKA; Chemical: OKA; Chemical: dinophysistoxin - 2