The closure of the lactam ring in the other monobactams, such as sulfazecin and the nocardicins, may involve a third mechanism involving inversion of configuration at the β-carbon.
O peche do anel lactámico nos outros monobactams, como a sulfazecina e as nocardicinas, pode implicar un terceiro mecanismo no que se produce unha inversión de configuración no carbono β.