(R)-2-[1-(2,3-dimethoxy-4-methyl-phenyl)-ethyl]-4,4,5,5-tetramethyl-[1,3,2]-dioxaborolane

(S)-2-[2-(2,3-dimethoxy-4-methyl-phenyl)-propyl]-4,4,5,5-tetramethyl-[1,3,2]-dioxaborolane