11888
Ethyl ester prodrug 42 advanced to human clinical trials based on the excellent intestinal fluid stability , good permeability and superior efficacy in non - human primates .
 Chemical: Ethyl ester
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: Ethyl ester