2H-1,4-Dioxadicyclopent[cd,f]azulene-3,9-dione, 2a,4a,5,6,6a,9a,9b,9c-octahydro-2-hydroxy-2,2a,6,9a-tetramethyl- 2H-1,4-Dioxadicyclopent[cd,f]azulene-3,9-dione, 2a,4a,5,6,6a,9a,9b,9c-octahydro-2-hydroxy-2,2a,6,9a-tetramethyl-, [2R-(2.alpha.,2a.alpha.,4a.alpha.,6.alpha.,6a.alpha.,9a.beta.,9b.alpha.,9c.alpha.)]- 55780-22-8 NSC19942 TENULIN