15-Cyanopuupehenol 2H-Benzo[a]xanthene-12-carbonitrile, 1,3,4,4a,5,6,6a,12,12a, 12b,-decahydro-9,10-dihydroxy-4,4,6a,12b-tetramethyl-, (4a. alpha.,6a.alpha.,12.alpha.,12a.alpha.,12b.beta.)-(-)-, NSC663003