1464
This study describes two novel mGlu 5 PAMs , LSN2463359 ( N - ( 1 - methylethyl ) - 5 - ( pyridin - 4 - ylethynyl ) pyridine - 2 - carboxamide ) and LSN2814617 [ ( 7S ) - 3 - tert - butyl - 7 - [ 3 - ( 4 - fluorophenyl ) - 1 , 2 , 4 - oxadiazol - 5 - yl ] - 5 , 6 , 7 , 8 - tetrahydro [ 1 , 2 , 4 ] triazolo [ 4 , 3 - A ] pyridine ] , which are useful tools for this field of research .
 Chemical: LSN2463359; Chemical: N - ( 1 - methylethyl ) - 5 - ( pyridin - 4 - ylethynyl ) pyridine - 2 - carboxamide; Chemical: LSN2814617; Chemical: ( 7S ) - 3 - tert - butyl - 7 - [ 3 - ( 4 - fluorophenyl ) - 1 , 2 , 4 - oxadiazol - 5 - yl ] - 5 , 6 , 7 , 8 - tetrahydro [ 1 , 2 , 4 ] triazolo [ 4 , 3 - A ] pyridine
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
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Answer:
 Chemical: LSN2463359; Chemical: N - ( 1 - methylethyl ) - 5 - ( pyridin - 4 - ylethynyl ) pyridine - 2 - carboxamide; Chemical: LSN2814617; Chemical: ( 7S ) - 3 - tert - butyl - 7 - [ 3 - ( 4 - fluorophenyl ) - 1 , 2 , 4 - oxadiazol - 5 - yl ] - 5 , 6 , 7 , 8 - tetrahydro [ 1 , 2 , 4 ] triazolo [ 4 , 3 - A ] pyridine