The organic layer was dried over anhydrous MgSO4 and the solvent removed under reduced pressure to afford a residue that upon trituration with hexane gave the product.

• 有机层在无水硫酸镁的作用下被干燥了。在压力减少的情况下，溶剂被去除了，残渣和己烷一起研磨后得到了这种产品。