13772
Its structural elucidation was accomplished using a combination of spectroscopic and chemical methods , including HRMS , extensive 1D and 2D NMR analysis , MS / MS fragmentation , and chemical degradation and Marfey ' s analysis of the resulting amino acid residues .
 Chemical: amino acid
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: amino acid