Steroidal Lactone Molecular Structure Diagram | Biochemical Reference #3257578 (License: Personal Use)

This image displays the 2D skeletal formula of a complex steroidal lactone, characterized by four fused cycloalkane rings, two hydroxyl groups (one axial, one equatorial), three methyl groups (including C-18 and C-19), and a five-membered unsaturated lactone ring attached at C-17. Stereochemistry is indicated via wedge/dash bonds, and variable side chains are denoted as R¹, R², and R³ for generalization across analogs like bufadienolides or cardenolides.

Used in academic, pharmaceutical, and biochemical resources to illustrate natural product scaffolds-particularly cardiac glycosides or steroid-derived toxins. Matches user intent for structural elucidation, drug design reference, or educational material on steroid biosynthesis and modification.