13441
Moreover , a comparison of the experimental ( 13 ) C NMR spectra with the spectra calculated using the M1 - M4 models strongly supports the data for the M4 model .
 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: ( 13 ) C