This is described in U.S. Pat. No. 4,966,723, Hodge et al., incorporated by reference herein.Preferred bleach activators are: ##STR10##wherein R.sup.1 is H or an alkyl group containing from about 1 to about 6 carbon atoms and R.sup.2 is an alkyl group containing from about 1 to about 6 carbon atoms and L is as defined above.Preferred bleach activators are also those of the above general formula wh