Fig. 4From: Enhancement of oral bioavailability of doxorubicin through surface modified biodegradable polymeric nanoparticlesMass spectrum of a doxorubicin parent ion (protonated precursor [M−H]+ ions at m/z 544.42) and b doxorubicin product ion (major fragmented product ion at m/z 397.27) showing fragmentation transitionsBack to article page