23268
High etomidate concentrations completely protect the beta 2M286C suflhydryl from covalent modification , suggesting close steric interactions .
 Chemical: etomidate; Chemical: suflhydryl
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: etomidate, suflhydryl 
Answer:
 Chemical: etomidate; Chemical: suflhydryl