1920
The peptide sequence synthesized was in the reverse order of the human peptide with the stable isotope - labels in the amino acid arginine ( ( 13 ) C6 ( 15 ) N4 ) resulting in an increase in the mass of the SIL peptide of 10 amu , from 1753 to 1763 .
 Chemical: amino acid; Chemical: arginine; Chemical: ( 13 ) C6 ( 15 ) N4
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; Chemical: arginine; Chemical: ( 13 ) C6 ( 15 ) N4