30269
Of the three conjugates , the ones having amino groups transport alkali metal ions in the order of Na ( + ) > Li ( + ) > K ( + ) =~ Rb ( + ) =~ Cs ( + ) , whereas the one having acetamido groups functions in the order of Li ( + ) > Na ( + ) > K ( + ) =~ Rb ( + ) =~ Cs ( + ) .
 amino, Na ( + ), Li ( + ), K ( + ), Rb ( + ), Cs ( + ), acetamido, Li ( + ), Na ( + ), K ( + ), Rb ( + ), Cs ( + )
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 amino, Na ( + ), Li ( + ), K ( + ), Rb ( + ), Cs ( + ), acetamido, Li ( + ), Na ( + ), K ( + ), Rb ( + ), Cs ( + )