23077
Mole fractions of structural fragments ( kappa exp ) responsible for the polar interactions within polyurethane chains were calculated by ( 1 ) H NMR method .
 Chemical: polyurethane; Chemical: ( 1 ) H
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: polyurethane; Chemical: ( 1 ) H