The molecule is a steroid lactone that has been used in the treatment of preeclampsia. A synthetic bufadienolide it is an antagonist of marinobufagenin (MBG) and differs from it by replacement of its 5beta-OH and 13beta-Me groups by hydrogen. It is a steroid lactone and an epoxy steroid. It derives from a bufanolide.
5-[(1R,2S,4R,6S,7R,10S,11S,14S,16R)-14-hydroxy-11-methyl-3-oxapentacyclo[8.8.0.02,4.02,7.011,16]octadecan-6-yl]pyran-2-one