Pharmaceutically, a non-endogenous
compound in
the field of biological/organic
chemistry. Essentially meaning, the unnatural occurence or man made molecule.
Oxymorphone is a
semi synthetic compound derived from naturally occurring thebaine and morphine found within the opium poppy
plant. Fentanyl, another opioid agonist is not derived from any endogenous compound; therefore it is considered a
fully synthetic chemical.