Looks to me like di-dehydroepiandrosterone is just two pheromone molecules "stuck" together. This site seems convincing that the product works, so I'm not sure that their claims are necessarily untrue. I can see where some of their references to University of Chicago might be mistaken, but again, that doesn't mean their pheromone product doesn't work or that a double-molecule form of pheromone (more concentrated?) has been formulated by their labs.