Iristectorenes A and C-G, monocyclic triterpene esters from Iris tectorum

Abstract Six new triterpene esters, iristectorenes A and C-G, along with one known one have been found in the seeds of Iris tectorum . On the basis of spectroscopic methods and chemical evidence, the esters were established to be 3-{3-hydroxy-2-[5-hydroxy-4,8,12-trimethyl-(3 E ,7 E )-3,7,1 1-tridecatrienyl]-2,3-dimethyl-6-(1-methyl-2-oxoethylidene)-cyclohexyl}propyl ( Z )-9-tetradecenoate,( Z )-11-hexadecenoate, ( Z,Z )-9,12-octadecadienoate, hexadecanoate, ( Z )-11-octadecenoate and octadecanoate, respectively.