Thus they might have considered swords as the most potent and powerful object. Cyclophosphamide is one of the most potent immunosuppressive substances. The captives are portrayed as strong and sexually potent. Clobetasol propionate has greater teratogenic potential than steroids that are less potent. This pheromone is one of the most potent known biological effector molecules. FBLD is a technique being used in research for discovering novel potent inhibitors. Fluorophosphate esters are among the most potent neurotoxins known. Myrtle was thought a particularly potent aphrodisiac. These were peptidomimetic inhibitors with improved structures that made them more specific, potent and stable. There are only a handful of equally potent sensitisers. Ozone is a toxic gas, even more potent than chlorine. The estrane steroid estradiol is the most potent and prevalent of these. He underwent a treatment using ibogaine, a potent hallucinogenic drug. Long-term use of oral contraceptives with highly potent progestins can also induce endometrial atrophy. Fentanyl analogues may be hundreds of times more potent than heroin.