Charles Joseph Tanret

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Charles Joseph Tanret (9 August 1847, in Joinville, France – 10 July 1917, in Paris) was a French pharmacist and chemist.

He notably studied the chemistry of sugars, reporting his observations of the mutarotation of glucose in 1895.[1] He also identified quebrachitol in 1887 from the bark of Aspidosperma quebracho.[2]

His son Georges was also a pharmacist, specialist of plant chemistry. Georges Tanret identified an alkaloid (galegine) from Galega officinalis that was evaluated in clinical trials in patients with diabetes in the 1920s and 1930s.[3][4]


  1. ^ Sur les modifications moléculaires du glucose. C. Tanret, Comptes Rendus 1895; 120: 1060–1062
  2. ^ An investigation of quebrachitol as a sweetening agent for diabetics. Robert Alexander McCance and Robert Daniel Lawrence, Biochem J. 1933; 27(4): 986–989
  3. ^ Simonnet H, Tanret G. Sur les propietes hypoglycemiantes du sulfate de galegine. Bull Soc Chim Biol Paris 1927
  4. ^ Bailey CJ, Campbell IW, Chan JCN, Davidson JA, Howlett HCS, Ritz P (eds). 2007. Metformin: the Gold Standard. A Scientific handbook; Chichester: Wiley. Chapter 1: Galegine and antidiabetic plants

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