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Several other boron - based compounds are in various phases of clinical trials , which illustrates the promise of this approach for medicinal chemists working in the area of boron chemistry .
 Chemical: boron; Chemical: boron
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: boron; Chemical: boron