80427-40-3

obtained by partial demethylation of 2,4′,5-trimethoxy-benzophenone (SM) with aluminium chloride in nitro-methane at 20° for 24 h. SM was obtained by FriedelCrafts acylation of 1,4-dimethoxy-benzene with p-anisoyl chloride in the presence of stannic chloride in nitromethane at 20° for 1 h.