SMILES: C[C@]12CC[C@H]3[C@H]([C@H]1CC[C@@H]2C4=CC(=O)OC4)CCC5[C@@]3(CCCC5)C
Description: The molecule is a steroid lactone that is a C23 steroid with methyl groups at C-10 and C-13 and a butenolide ring at C-17. It is a steroid fundamental parent and a member of cardenolides.