<jats:title>Abstract</jats:title><jats:p>Two novel norditerpenoid alkaloids, macrorhynines A and B (<jats:bold>1</jats:bold> and <jats:bold>2</jats:bold>), together with seven known compounds, were isolated from <jats:italic>Aconitum macrorhynchum.</jats:italic> The structures of the new compounds were elucidated as (1<jats:italic>α</jats:italic>,6<jats:italic>α</jats:italic>,14<jats:italic>α</jats:italic>)‐8‐acetoxy‐1,6,16‐trimethoxy‐4‐(methoxymethyl)aconitan‐14‐yl 4‐methoxybenzoate (<jats:bold>1</jats:bold>) and (1<jats:italic>α</jats:italic>,6<jats:italic>α</jats:italic>,14<jats:italic>α</jats:italic>)‐8‐acetoxy‐13‐hydroxy‐1,6,16‐trimethoxy‐4‐(methoxymethyl)aconitan‐14‐yl 4‐methoxybenzoate (<jats:bold>2</jats:bold>) on the basis of spectral analyses. The novel compounds were found to contain the rare C(19)N, azomethine, group.