17153
Taken together , the experimental and simulation results ( cumulative MD sampling of 0 . 2 ms ) suggest that , despite the inability of carnosine to form stable contacts with A beta , it might block the pathway toward toxic aggregates by perturbing the hydrogen bond network near residues with key roles in fibrillogenesis .
 Chemical: carnosine; Chemical: hydrogen
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: carnosine; Chemical: hydrogen