What is the difference between sevoflurane, isoflurane, and enflurane?

# of fluorine atoms: Chemically, they are all halogenated ethers that can produce general anesthesia (GA) in humans. The sevoflurane has the highest number of fluorine atoms (7) and less pungent than isoflurane; enflurane is not in general use nowadays. They differ in their potency, solubility in plasma, and volatility, which requires use of designated vaporizers and different concentrations in the brain to achieve GA