5879
Four groups of organophosphonate derivatives enantiomers were separated on N - ( 3 , 5 - dinitrobenzoyl ) - S - leucine chiral stationary phase .
 Chemical: organophosphonate; Chemical: N - ( 3 , 5 - dinitrobenzoyl ) - S - leucine
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: organophosphonate; Chemical: N - ( 3 , 5 - dinitrobenzoyl ) - S - leucine