5,6-Bis(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-3a,4,7,7a-tetrahydroisobenzofuran-1,3-dione 50mg

5,6-Bis(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-3a,4,7,7a-tetrahydroisobenzofuran-1,3-dione 50mg