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Vasopressin and oxytocin contain a disulfide linkage leaving them particularly vulnerable to deactivation from the reducing environment inside the cell .
 Chemical: Vasopressin; Chemical: oxytocin; Chemical: disulfide
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: Vasopressin; Chemical: oxytocin; Chemical: disulfide