16389
Saturable active efflux by p - glycoprotein and breast cancer resistance protein at the blood - brain barrier leads to nonlinear distribution of elacridar to the central nervous system .
 Chemical: elacridar
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities: elacridar 
Answer:
 Chemical: elacridar