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This study introduces GS967 ( 6 - [ 4 - ( trifluoromethoxy ) phenyl ] - 3 - ( trifluoromethyl ) - [ 1 , 2 , 4 ] triazolo [ 4 , 3 - a ] pyridine ) , a potent and selective inhibitor of late I ( Na ) , and demonstrates its effectiveness to suppress ventricular arrhythmias .
 Chemical: GS967; Chemical: 6 - [ 4 - ( trifluoromethoxy ) phenyl ] - 3 - ( trifluoromethyl ) - [ 1 , 2 , 4 ] triazolo [ 4 , 3 - a ] pyridine; Chemical: Na
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: GS967; Chemical: 6 - [ 4 - ( trifluoromethoxy ) phenyl ] - 3 - ( trifluoromethyl ) - [ 1 , 2 , 4 ] triazolo [ 4 , 3 - a ] pyridine; Chemical: Na