15839
The herein presented complete structure of the core oligosaccharide of lipopolysaccharide ( LPS ) P . shigelloides Polish Collection of Microorganisms ( PCM ) 2231 ( serotype O17 ) was investigated by ( 1 ) H , ( 13 ) C NMR spectroscopy , mass spectrometry , chemical analyses and serological methods .
 Chemical: ( 1 ) H; 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: ( 1 ) H; Chemical: ( 13 ) C