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The title compound, C(11)H(22)NO(2) (+)·I(-), is a chiral mol-ecule with five stereogenic centres. The absolute configuration was assigned from the synthesis and confirmed by the structure determination. The central six-membered ring of the indolizine system adopts a chair conformation, with two atoms displaced by -0.690 (2) and 0.550 (2) Å from the plane of the other four atoms. The conformation of the pyrrolidine ring is close to that of an envelope, with the flap atom displaced by 0.563 (2) Å from the plane of the remaining four atoms. In the crystal, there are two O-H⋯I hydrogen bonds.

(4R,6S,7S,8S,8aS)-6-Ethyl-7,8-dihydroxy-4-methyl-1,2,3,5,6,7,8,8a-octahydroindolizin-4-ium iodide