18802
Additionally , there was a significant difference in plasma concentrations of ( R ) - 5 - hydroxyomeprazole among CYP2C19 genotype groups , whereas no significant differences were observed in that of ( S ) - 5 - hydroxyomeprazole .
 Chemical: ( R ) - 5 - hydroxyomeprazole; Chemical: ( S ) - 5 - hydroxyomeprazole
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: ( R ) - 5 - hydroxyomeprazole, ( S ) - 5 - hydroxyomeprazole 
Answer:
 Chemical: ( R ) - 5 - hydroxyomeprazole; Chemical: ( S ) - 5 - hydroxyomeprazole