18801
RESULTS : Mean plasma concentrations of ( R ) - and ( S ) - omeprazole in PMs were significantly higher than those in hmEMs and htEMs , and similar results were obtained in the case of omeprazole sulfone .
 Chemical: ( R ) - and ( S ) - omeprazole; Chemical: omeprazole sulfone
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 ) - and ( S ) - omeprazole, omeprazole sulfone 
Answer:
 Chemical: ( R ) - and ( S ) - omeprazole; Chemical: omeprazole sulfone