<jats:title>Abstract</jats:title><jats:p>From the roots of a white‐flowering <jats:italic>Aconitum orientale</jats:italic> <jats:sc>Miller</jats:sc> sample, collected in Artvin‐Şavşat, Turkey, a new diterpenoid alkaloid named aconitorientaline (<jats:bold>1</jats:bold>) was isolated, along with the known diterpenoid alkaloids septentiriodine, lappaconitine, finaconitine, ranaconitine, puberanidine and delstaphinine (<jats:italic>Fig.</jats:italic>). The structure of <jats:bold>1</jats:bold> was established on the basis of <jats:sup>1</jats:sup>H‐ and <jats:sup>13</jats:sup>C‐NMR, DEPT, <jats:sup>1</jats:sup>H,<jats:sup>1</jats:sup>H‐COSY, NOESY, HSQC, and HMBC studies. All the known compounds were identified by comparison of their <jats:sup>1</jats:sup>H‐ and <jats:sup>13</jats:sup>C‐NMR data and co‐TLC behavior with those of authentic samples.