12730
Cells were cultured in myogenic or adipogenic differentiation media containing increasing concentrations ( 0 , 10 - (1) (3) , 10 - (1) (1) , 10 - 9 , 10 - 7 or 10 - 5 M ) of 1 , 25 ( OH ) 2 D 3 for up to 6 days and markers of muscle and fat development measured .
 1 , 25 ( OH ) 2 D 3
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 1 , 25 ( OH ) 2 D 3