3,3'-Dihydroxyhexestrol 4,4'-(1,2-Diethylethylene)dipyrocatechol 79199-51-2 BRN 3417559 NSC 35753 Pyrocatechol, 4,4'-(1,2-diethylethylene)di- Pyrocatechol, 4,4'-(meso-1,2-diethylethylene)di-