Tetrahydrocortisol

Tetrahydrocortisol, or urocortisol, also known as 3α,11β,17α,21-tetrahydroxy-5β-pregnan-20-one, is a steroid and an inactive metabolite of cortisol.

Tetrahydrocortisol is a neurosteroid and has been found to act as a negative allosteric modulator of the GABAA receptor, similarly to pregnenolone sulfate.