6443
These metabolites were detectable after one week post administration while unchanged methylstenbolone was only detectable in a brief period of 45 h .
 Chemical: methylstenbolone
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: methylstenbolone