Acta Crystallographica Section E: Crystallographic Communications 2017-Nov
Crystal structure of akuammicine, an indole alkaloid from Catharanthus roseus.
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The title compound, C20H22N2O2, an alkaloid isolated from the Madagascar periwinkle, crystallizes in P1 with two independent but closely similar mol-ecules in the unit cell. The mol-ecules are linked into pairs by two N-H⋯O=C hydrogen bonds. The absolute configuration was confirmed by anomalous dispersion effects as S at the 3 and 15 positions, and R at the 7 position.