18803
Similarly , ( R ) - omeprazole HI in hmEMs , htEMs , and PMs were 5 . 6 , 3 . 1 , and 0 . 3 , respectively , which were significantly different , but no significant difference was present in the ( S ) - omeprazole HI .
 Chemical: ( R ) - omeprazole; Chemical: ( S ) - omeprazole
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 ) - omeprazole, ( S ) - omeprazole 
Answer:
 Chemical: ( R ) - omeprazole; Chemical: ( S ) - omeprazole