2,2′-Dihydroxy-3,3′-dimethoxy-5,5′-dimethyl-6,6′-dibromo-1,1′-biphenyl: preparation, resolution, structure and biological activity

2,2′-Dihydroxy-3,3′-dimethoxy-5,5′-dimethyl-6,6′-dibromo-1,1′-biphenyl: preparation, resolution, structure and biological activity