
Keywords: DIPEA، diisopropylethylamine; BS, brassinosteroids; TBAB, tetrabutylammonium bromide; DIPEA, diisopropylethylamine; DMP, Dess–Martin periodinaneBrassinosteroids; 24-Epibrassinolide; Boric acid ester; 24-Epicryptolide; 22-Dehydro-24-epibrassinolide