20885
The highly reactive conjugated aldehydes ( alpha , beta - unsaturated aldehydes and 2 , 3 - epoxyaldehydes ) are sensitizing moieties , while nonconjugated aldehydes and nonterminal aliphatic epoxides show low reactivity and low sensitization potency .
 Chemical: aldehydes; Chemical: alpha , beta - unsaturated aldehydes; Chemical: 2 , 3 - epoxyaldehydes; Chemical: aldehydes; Chemical: epoxides
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: aldehydes; Chemical: alpha , beta - unsaturated aldehydes; Chemical: 2 , 3 - epoxyaldehydes; Chemical: aldehydes; Chemical: epoxides