3(2H)-Furanone, 5-[1-[(2R,6S)-5-[(3S,3aS,5aS,8S,9aS,9bR)-~ dodecahydro-8-hydroxy-3a,6,6,9a-tetramethyl-7-oxo-1H-benz~ [e]inden-3-yl]-3,6-dihydro-6-hydroxy-2H-pyran-2-yl]ethenyl]-2,2-dimethyl-, rel-(-)- NSC712400 Sodagnitin A