23304
It is shown that a more realistic model representing the ( 1 ) H arrangement of n - C20H42 / d - urea can describe the result .
 Chemical: ( 1 ) H; Chemical: n - C20H42; Chemical: d - urea
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: n - C20H42; Chemical: d - urea