Pregn-5-en-20-one-20,21-13C2-16,16-d2, 3-hydroxy-, (3β)-; (3β)-3-Hydroxypregn-5-en-20-one; Pregn-5-en-20-one, 3β-hydroxy-; 17β-[1-Ketoethyl]-Δ5-androsten-3β-ol; 3β-Hydroxy-5-en-20-one; 3β-Hydroxy-5-pregnene-20-one; 3β-Hydroxy; Δ5-Pregnen-20-one; 3β-Hydroxypregn-5-en-20-one; 5-Pregnenolone; Pregn-5-en-3β-ol-20-one; Pregn-5-ene-3β-ol-20-one; Δ5-Pregnen-3β-ol-20-one; Δ5-Pregnene-3β-ol-20-one; Δ5-Pregnenolone