Names of fundamental structures most often used in steroid nomenclature

▪ Table

Names of fundamental structures most often used in steroid nomenclature

carbon atoms present (as numbered in structure 6) naturally occurring

general

classes examples shown in text

gonane 1–17 none gonane* (1)

estrane 1–18 estrogens estradiol (17f)

androstane 1–19 androgens androstane* (2–5); testosterone (17e); androstanedione (17c)

pregnane 1–21 gestogens and adrenal steroids progesterone (17a); cortisol (17b); aldosterone (17d); batrachotoxin (14)

cholane 1–24 bile acids cholic acid (10a); sodium sodium glycocholate (10b)

cholestane 1–27 sterols cholesterol (16d); scymnol (11a)

ergostane 1–28 sterols ergosterol (8); cyasterone (22)

stigmastane 1–29 sterols stigmasterol (7); antheridiol (12)

lanostane 1–27; 30–32 trimethyl sterols lanosterol (16c);

22,25-oxidoholothurinogenin (13)

cardanolide 1–23 cardiac glycosides digitoxigenin (23)

bufanolide 1–24 toad poisons bufotoxin (24)

spirostan 1–27 sapogenins dioscin (25)

*Gonane and androstane themselves do not occur in nature.

See as table:

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