14472
Although 5b and 6 failed to inhibit replication or kill Mtb in vivo , they illuminate a path to new structural variations of the tryptanthrin scaffold that may maximize the potential of this class of compounds against TB .
 Chemical: tryptanthrin
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: tryptanthrin