Chemical structures of steroids and avicin D.

Abstract

<p>(A) The basic ring structure of a steroid molecule. (B) Chemical structure of dexamethasone, a prototypical steroid. (C) Chemical structure of avicin D. Part 1 of the molecule has the core 5-ring structure which resembles the core structure of a steroid molecule, and part 2 has a side chain containing two units of acyclic monoterpenes, connected by a quinovose sugar.</p