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An alternative ' backdoor ' pathway of dihydrotestosterone synthesis that bypasses testosterone has been described in marsupials , but its relevance to human biology has been uncertain .
 Chemical: dihydrotestosterone; Chemical: testosterone
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: dihydrotestosterone; Chemical: testosterone