3640
Comparisons with electronic structure calculations and previous work on alkanes indicate that the conductance of the oligoethers is lower than that of alkane chains with the same length .
 Chemical: alkanes; Chemical: oligoethers; Chemical: alkane
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: alkanes; Chemical: oligoethers; Chemical: alkane