the benzanthraquinones adriamycin , daunorubicin , carminomycin , 7-o-methylnogalarol , and aclacinomycin a and the n-heterocyclic quinones streptonigrin and mitomycin c are activated to free radical intermediates which can transfer their single electron to molecular oxygen to form superoxide .
C0011015
daunorubicin
C0007308
carminomycin