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. Author manuscript; available in PMC: 2010 Dec 1.
Published in final edited form as: Psychoneuroendocrinology. 2009 Dec;34S1:S178–S185. doi: 10.1016/j.psyneuen.2009.06.001

Figure 1. The chemical structures of 5α (A) and 5β (B) neuroactive steroids discussed in this review.

Figure 1

The chemical names of the neuroactive steroids are as follows: 3α5αP, (3α, 5α)-3-Hydroxypregnan-20-one; ent-3α5αP, (3β,5β,8α,9β,10α,13α,14β,17α)-3-Hydroxypregnan-20-one; ALPX, (3α,5α)-3 Hydroxypregnane-11,20-dione; ent-ALPX, (3β,5β,8α,9β,10α,13α,14β,17α)-3-Hydroxypregnane-11,20-dione; ACN, (3α,5α,17β)-3-Hydroxyandrostane-17-carbonitrile; ent-ACN, (3β,5β,8α,9β,10α,13α,14β,17α)-3-Hydroxyandrostane-17-carbonitrile; ECN, (3β,5α,17β)-17-Hydroxyestrane-3-carbonitrile; ent-ECN, (3α,5β,8α,9β,10α,13α,14β,17α)-17-Hydroxyestrane-3 carbonitrile; CDNC24, (3α,5α)-3-hydroxy-13,24-cyclo-18,21-dinorchol-22-en-24-one; 3αCN, (3α,5β,17β)-17-Hydroxyandrostane-3-carbonitrile; 19-Nor3αCN, (3α,5β17β)-17-Hydroxyestrane-3-carbonitrile; 3αOH, (3α,5β,17β)-3-Hydroxyandrostane-17-carbonitrile; 19-Nor3αOH, (3α,5β,17β)-3-Hydroxyestrane-17-carbonitrile; 3βCN, (3β,5β,17β)-17-Hydroxyandrostane-3-carbonitrile;19-Nor3βCN, (3β,5β17β)-17-Hydroxyestrane-3-carbonitrile; 3βOH, (3β,5β,17β)-3-Hydroxyandrostane-17-carbonitrile;19-Nor3βOH, (3β,5β,17β)-3-Hydroxyestrane-17-carbonitrile.