Cyclopropane- and spirolimonoids and related compounds from Hortia oreadica

► Limonoids of unprecedented structural type were isolated. ► Limonoids were isolated, and their chemotaxonomical significance is discussed. ► Cyclopropanelimonoids were isolated from Hortia oreadica. ► Spirolimonoids were isolated from H. oreadica. ► The biogenesis of cyclopropane- and spirolimonoids is discussed.