18031
Here we report the isolation and structural characterization of a thermally stable compound featuring a Cu - B one - electron bond , as well as its oxidized ( nonbonded ) and reduced ( two - electrons - bonded ) congeners .
 Chemical: Cu - B
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: Cu - B