21308
Results suggest that sorafenib uptake in human hepatocytes occurs via passive diffusion , and by OCT1 and a rifamycin - sensitive transporter .
 Chemical: sorafenib; Chemical: rifamycin
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: sorafenib; Chemical: rifamycin