16α-Methyl-11-oxoprednisolone, also known as dexamethasone impurity J, 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 reported in 1979 and was never marketed.

References

Diols Glucocorticoids Pregnanes Triketones {{steroid-stub