20944
Characterization of all compounds was performed using one - dimensional NMR techniques ( ( 1 ) H , ( 13 ) C - APT ) , IR spectra , elemental analyses and high - resolution electrospray ionization mass spectrometry ( HR - ESI - MS ) .
 Chemical: ( 1 ) H; Chemical: ( 13 ) C
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: ( 1 ) H; Chemical: ( 13 ) C