3a, 7a, 12a-trihydroxycholanic acid

The chief bile acids are the taurine and glycine derivates of dwlic add (3a, 7a, 12a-trihydroxycholanic acid), of deoxycholic add (3a, 12a-dihydroxycholanic acid), and of the isomeric chenodeoxycholic add (3a,7a-dihydroxycholanic acid). The bile acids are one of the end products of the metabolism of cholesterol however, over 90% of the amount secreted (20-30 gm per day) is reabsorbed in the intestine and thus stays in the enterohepatic circulation. 

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