26437
The structure of the new compound was established by spectroscopic studies which include ( 1 ) H NMR , ( 13 ) C NMR , NOESY , HetCOSY , COLOC experiments and single crystal X - ray diffraction analysis .
 ( 1 ) H, ( 13 ) C
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 ( 1 ) H, ( 13 ) C