Isoprednidene (developmental code name StC 407) is a

synthetic Synthetic things are composed of multiple parts, often with the implication that they are artificial. In particular, 'synthetic' may refer to: Science * Synthetic chemical or compound, produced by the process of chemical synthesis * Synthetic o ...

corticosteroid Corticosteroids are a class of steroid hormones that are produced in the adrenal cortex of vertebrates, as well as the synthetic analogues of these hormones. Two main classes of corticosteroids, glucocorticoids and mineralocorticoids, are involv ...

which was never marketed.

References

Diketones Glucocorticoids Pregnanes Triols Abandoned drugs Vinylidene compounds Hydroxyketones Primary alcohols Secondary alcohols Tertiary alcohols {{steroid-stub