nordihydroguaiaretic acid1,4-bis(3,4-dihydroxyphenyl)-2,3-dimethylbutane2,3-bis(3,4-dihydroxyphenylmethyl)butane4,4'-(2,3-dimethyl-1,4-butanediyl)bis(pyrocatechol)4,4'-(2,3-dimethyltetramethylene)dipyrocatecholNDGANSC 4291beta,gamma-dimethyl-alpha,delta-bis(3,4-dihydroxyphenyl)butanenordihydroguaiaretic acidnordihydroguaiaretic acid (unspecified)norhydroguaiaretic acid