17230
Novel mutations within the transmembrane domain ( TM ) regions were identified that had differential effects on acetylene PAMs versus 2 - methyl - 6 - ( phenylethynyl ) - pyridine , a prototypical NAM .
 Chemical: acetylene; Chemical: 2 - methyl - 6 - ( phenylethynyl ) - pyridine
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: acetylene; Chemical: 2 - methyl - 6 - ( phenylethynyl ) - pyridine