a 99 02638 wo a 99 02639 and the cytochrome based enzymatic bleaching systems described in wo a 99 02641 the activity of oxidoreductases in particular the phenol oxidising enzymes in a process for bleaching stains on fabrics and or dyes in solution and or antimicrobial treatment can be enhanced by adding certain organic compounds called enhancers examples of enhancers are 2 2 u2032 azo bis 3 ethylbenzo thiazoline 6 sulphonate abts and phenothiazine 10 propionate ptp more enhancers are described in wo a 94 12619 wo a 94 12620 wo a 94 12621 wo a 97 11217 wo a 99 23887 enhancers are generally added at a level of 0 01 to 5 by weight of detergent composition builders polymers and other enzymes as optional ingredients may also be present as found in wo0060045 suitable detergency builders as optional ingredients may also be present as found in w00034427 the invention will now be further illustrated by way of the following non limiting examples dimethyl 2 4 di 2 pyridyl 3 methyl 7 pyridin 2 ylmethyl 3 7 diaza bicyclo 3 3 1 nonan 9 one 1 5 dicarboxylate n2py3o c1 and the iron complex thereof fen2py3o c1 was prepared as described in pct ep01 13314 the bispidons instead of.