Complex sentence: The most commonly used local anesthetics are lidocaine (also called xylocaine, a modern replacement for novocaine, procaine), septocaine, marcaine (a long-acting anesthetic), and mepivacaine.
Split into simpler sentences: The most commonly used local anesthetic is lidocaine (also called xylocaine), a modern replacement for novocaine and procaine. Other local anaesthetics in current use include septocaine, marcaine (a long-acting anesthetic), and mepivacaine.