SMILES: C[C@]12CC[C@@H](C[C@]1(CC[C@@H]3[C@@H]2CC[C@]4([C@]35[C@H](O5)C[C@@H]4C6=COC(=O)C=C6)C)O)O
Description: The molecule is a cardiotonic steroid secreted by the toad Bufo rubescens and other related species such as Bufo marinus. An endogenous Na/K-ATPase inhibitor, it is a vasoconstrictor with effects similar to digitalis. It has a role as an EC 3.6.3.9 (Na(+)/K(+)-transporting ATPase) inhibitor and an epitope. It is a steroid hormone and an epoxy steroid. It derives from a (5beta)-bufadienolide.