30431
During the 1H nuclear magnetic resonance spectra ( 1H NMR ) study , the chemical shift perturbation and spin - lattice relaxation times of different protons were further used to investigate the interaction of GV with BHb and the results indicated that GV bound orientationally to BHb .
 Chemical: 1H; Chemical: 1H
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: 1H