17674
Few GC - MS features were associated with the presence of the non - derivatizeable 11oxo group in pregnane ( ene ) s .
 Chemical: 11oxo; Chemical: pregnane ( ene ) s
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: 11oxo; Chemical: pregnane ( ene ) s