| pregnane | Parent hydrocarbon of two series of steroids stemming from 5a-pregnane (originally allopregnane) and 5b-pregnane (17b-ethyletiocholane). 5b-Pregnane is the parent of the progesterones, pregnane alcohols, ketones, and several adrenocortical hormones and is found largely in urine as a metabolic product of 5b-pregnane compounds. For structure, see steroids. (05 Mar 2000) |
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| pregnanediol | <chemical> Chemical name: Pregnanediol (12 Dec 1998) |
| pregnanedione | 5b-Pregnane-3,20-dione;a metabolite of progesterone, formed in relatively small quantities, that occurs in 5a and 5b isomeric forms. (05 Mar 2000) |
| pregnanediones | Pregnane derivatives in which two side-chain methyl groups or two methylene groups in the ring skeleton (or a combination thereof) have been oxidised to keto groups. (12 Dec 1998) |
| pregnanes | Saturated derivatives of the steroid pregnane. The 5-beta series includes progesterone and related hormones; the 5-alpha series includes forms generally excreted in the urine. (12 Dec 1998) |
| pregnanetriol | <chemical> Chemical name: Pregnanetriol (12 Dec 1998) |