1258-84-0 24-Nor-D:A-friedooleana-1(10),3,5,7-tetraen-29-oic acid, 3-hydroxy-2-oxo-, methyl ester D:A-Friedo-24-noroleana-1(10),3,5,7-tetraen-29-oic acid, 3-hydroxy-2-oxo-, methyl ester, (20.alpha.)- NSC99281 PRISTIMERIN Pristimerine