[Study of the structure of anthracycline antibiotics by ERIAD mass spectrometry].

Fragmentation of antibiotics daunorubicin, carminomycin, doxorubicin and their semisynthetic analogues under conditions of the new mass spectrometry method ERIAD is discussed. Signals of protonated molecular ion (M + H)+ and ions of fragments are present in all the mass spectra. The results are compared with literary data obtained by means of other (EI and FAB MS) mass spectrometry methods.