13449
We present a scalable synthesis of a versatile MTX reagent with an azide ligation handle that allows rapid gamma - selective conjugation to yield MTX fusion compounds ( MFCs ) appropriate for MASPIT , a three - hybrid system that enables the identification of mammalian cytosolic proteins that interact with a small molecule of interest .
 Chemical: MTX; Chemical: azide; Chemical: MTX
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: MTX; Chemical: azide; Chemical: MTX