Carfentanil is an especially powerful fentanyl-by-product originally circulated within the mid-1980s as a standard anesthetic for giant animals which include elephants. Currently, carfentanil even now sees health-related and scientific use as being a radiotracer for positron emission tomography imaging, relevant to its substantial affinity for MORs in brain tissue [fourteen]. https://directorylandia.com/listings405761/5-simple-statements-about-protonitazene-for-sale-in-copyright-explained