19-Nor-9-beta,10-alpha-lanosta-1,5,23-triene-3,11,22-trione, 9-methyl-2,16,20,25-tetrahydroxy-, 2,16-diacetate 26260-20-8 4-08-00-03731 (Beilstein Handbook Reference) BRN 3191081 Diacetyl-2,16 cucurbitacine (I)