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Certain organophosphorus compounds ( OPCs ) inhibit various serine esterases ( EOHs ) via phosphorylation of their active site serines .
 Chemical: organophosphorus; Chemical: serine; Chemical: serines
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: organophosphorus; Chemical: serine; Chemical: serines