Calotropin Card-20(22)-enolide, 14-hydroxy-19-oxo-2,3-[(tetrahydro-3,4-dihydroxy- 6-methyl-2H-pyran-3,2-diyl)bis(oxy)]-, [2.alpha.(2S,3S,4S,6R),3.beta.,5.alpha.]- Card-20(22)-enolide, 14-hydroxy-19-oxo-2,3-[[(2S,3S,4S,6R)-tetrahydro- 3,4-dihydroxy-6-methyl-2H-pyran-3,2-diyl]bis(oxy)]-,(2.alpha.,3.beta.,5.alpha.)- NSC143925 Pecilocerin A Pekilocerin A