You might use number 5 or number 19 to attract a male, but the for the Australian Chiloglottis orchids, the scent of seduction starts with 2,5-dialkylcyclohexane-1,3-diones, helpfully also called chiloglottones. The orchid isn’t trying to attract another orchid, it’s trying to entice the male of the Neozeleboria wasp genus. The aim isn’t to attract the wasp to nectar and pollen. Instead Chiloglottis orchids are sexually deceptive. They act rather like the European orchids in the video below, attempting to pull in a wasp so that can attach pollen that way.