22101
The difluororibonucleosides were prepared by non - stereoselective glycosidation of 6 - chloro - 7 - deazapurine with benzoyl - protected 2 - deoxy - 2 , 2 - difluoro - D - erythro - pentofuranosyl - 1 - mesylate , followed by amination and aqueous Suzuki cross - couplings with ( het ) arylboronic acids .
 Chemical: difluororibonucleosides; Chemical: 6 - chloro - 7 - deazapurine; Chemical: benzoyl - protected 2 - deoxy - 2 , 2 - difluoro - D - erythro - pentofuranosyl - 1 - mesylate; Chemical: ( het ) arylboronic acids
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: difluororibonucleosides; Chemical: 6 - chloro - 7 - deazapurine; Chemical: benzoyl - protected 2 - deoxy - 2 , 2 - difluoro - D - erythro - pentofuranosyl - 1 - mesylate; Chemical: ( het ) arylboronic acids