10802
In addition to the ground - state conformers , several stable low - energy excited conformers that differ slightly in the orientation of the phosphate ester moiety were also accessed in the experiments .
 Chemical: phosphate ester
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities: phosphate ester 
Answer:
 Chemical: phosphate ester