28564
At weakly acidic pH ( 6 . 5 ) , bisulfite and nitrite exhibited much stronger inhibition of PCFT - mediated transport while sulfate and nitrate remained non - inhibitory .
 bisulfite, nitrite, sulfate, nitrate
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 bisulfite, nitrite, sulfate, nitrate