1,2-Benzenediol, 4,4'-(2,3-dimethyl-1,4-butanediyl)bis- 500-38-9 AIDS-161274 AIDS161274 Dihydronorguaiaretic acid NDGA NSC4291 NSC682984 Nordihydroguaiaretic acid Pyrocatechol, 4,4'-(2,3-dimethyltetramethylene)di-