Synonyms: AC1NUGID;3-Epi-Isocucurbitacin B;89647-62-1;NSC359240;CUCURBITACIN B, 3 -EPI-ISO-;NSC-359240;[(E)-6-(3,16-dihydroxy-4,4,9,13,14-pentamethyl-2,11-dioxo-3,7,8,10,12,15,16,17-octahydro-1H-cyclopenta[a]phenanthren-17-yl)-6-hydroxy-2-methyl-5-oxohept-3-en-2-yl] acetate