(-)-Cleistanthol 2,3,6-Phenanthrenetriol, 8-ethenyl-1,2,3,4,4a,9,10,10a-octahydro-1,1,4a,7-tetramethyl-, [2S-(2.alpha.,3.alpha.,4a.alpha.,10a.beta.)]- 24465-21-2 NSC175410