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We also describe in detail the protocol of an organophosphine - based biotin labeling of protein S - nitroso moieties .
 Chemical: organophosphine; Chemical: biotin; Chemical: S; Chemical: nitroso
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: organophosphine; Chemical: biotin; Chemical: S; Chemical: nitroso