4587
First , recombinant HuPON1 purified from cabbage loopers ( iPON1 ; Trichoplusia ni ) was administered to guinea pigs , followed by exposure to at least 2times the median lethal dose ( LD50 ) of the OP nerve agents tabun ( GA ) , sarin ( GB ) , soman ( GD ) , and cyclosarin ( GF ) , or chlorpyrifos oxon , the toxic metabolite of the OP pesticide chlorpyrifos .
 tabun, sarin, soman, cyclosarin, chlorpyrifos oxon, chlorpyrifos
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 tabun, sarin, soman, cyclosarin, chlorpyrifos oxon, chlorpyrifos