27207
The challenge of locating two d - and one l - valine residue in 1 and 2 was accomplished by total synthesis using solid - phase peptide synthetic methods .
 Chemical: d - and one l - valine
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: d - and one l - valine 
Answer:
 Chemical: d - and one l - valine