30520
Then , the predictability for the both models , 2D - QSAR ( Rpred ( 2 ) = 0 . 91 ) and 3D - QSAR ( Rpred ( 2 ) = 0 . 77 ) , was experimentally validated , and compound 4u was identified as the most active anti - T . cruzi hit ( IC50 = 3 . 04 mu M ) .
 None
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 None