23704
The available X - ray structures contain only UCCG tetraloops which in addition differ in orientation ( anti vs syn ) of the guanine .
 Chemical: guanine
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: guanine 
Answer:
 Chemical: guanine