What is the general name of the chemicals which are added to fat and oil containing foods to prevent the development of rancidity?

Anti-oxidants are the chemicals which are added to fat and oil containing foods to slow or delay the development of rancidity. Natural Anti-oxidants are ascorbic acid ad tocopherols whereas synthetic anti- oxidants include Butylated hydroxyanisole (BHA) and Butylated hydroxytoluene (BHT)