Pregnenolone

**Definition:** A 21-carbon steroid, derived from CHOLESTEROL and found in steroid hormone-producing tissues. Pregnenolone is the precursor to GONADAL STEROID HORMONES and the adrenal CORTICOSTEROIDS.

**Tree numbers:** - D04.210.500.745.745.725 - D06.472.040.585.745 - D06.472.334.851.687.500

**Synonyms:** - 5-Pregnen-3-beta-ol-20-one