Stereoselective synthesis of <i>trans</i>-fused iridoid lactones and their identification in the parasitoid wasp <i>Alloxysta victrix</i>, Part II: Iridomyrmecins
Following our earlier approach to the synthesis of dihydronepetalactones, all eight stereoisomers of trans-fused iridomyrmecins were synthesized starting from the enantiomers of limonene. Combined gaschromatography and mass spectrometry including enantioselectivegaschromatography revealed that volatiles released by the endohyperparasitoid wasp Alloxysta victrix contain (4S,4aR,7S,7aR)-iridomyrmecin