4H-Furo(3',2':4,5)furo(2,3-h)-1-benzopyran-4-one, 10-(acetyloxy)-7a,9,10,10a-tetrahydro-9,9-dimethyl-2-phenyl-, (7aalpha,10beta,10aalpha)-(-)- 75444-25-6 Pseudosemiglabrin Semiglabrin