2,5-Cyclohexadiene-1,4-dione, 2-((3R,7R,11R)-3-hydroxy-3,7,11,15-tetramethylhexadecyl)- 2,5-Cyclohexadiene-1,4-dione, 2-(3-hydroxy-3,7,11,15-tetramethylhexadecyl)-, (theta-(theta,theta,theta))- 62726-91-4