Synonyms: Benzene,1,1'-(2,3-dimethyl-1,4-butanediyl)bis[3,4-dimethoxy- (9CI); Butane,1,4-bis(3,4-dimethoxyphenyl)-2,3-dimethyl- (6CI,8CI);1,4-Bis(3,4-dimethoxyphenyl)-2,3-dimethylbutane; Dimethyldihydroguaiareticacid; NSC 136955; Tetra-O-methyl nordihydroguaiaretic acid