21455
These drugs and their metabolites , along with desipramine and nortriptyline , undergo hydroxylation by CYP2D6 to less active metabolites .
 Chemical: desipramine; Chemical: nortriptyline
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: desipramine; Chemical: nortriptyline