5857
The structures of the compounds were elucidated by spectroscopic analysis , mainly 1D and 2D NMR techniques ( 1H , 13C , COSY , HMQC , and HMBC ) , as well as by comparison with literature data .
 Chemical: 1H; Chemical: 13C
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: 1H; Chemical: 13C