Diynes and triynes, species with the linkage RC≡C–C≡CR′ and RC≡C–C≡C–C≡CR′ respectively, occur in certain plants (Ichthyothere, Chrysanthemum, Cicuta, Oenanthe and other members of the Asteraceae and Apiaceae families).
Os diínos e triínos, especies cos enlaces RC≡C–C≡CR′ e RC≡C–C≡C–C≡CR′ respectivamente, aparecen en certas plantas (Ichthyothere, Chrysanthemum, Cicuta, Oenanthe e outros membros das familias Asteraceae e Apiaceae).