You searched for a fragment C12H13N2O3 in MassBank data.
- Page KO009130p → C12H13N2O3: C10H9N2O3 C10H7N2O2 C9H7N2O
- Page KOX00817p → C12H13N2O3: C12H11N2O2
- Page KOX00817p → C12H13N2O3: C10H7N2O2** C9H7N2O** C9H7N2** C8H7N2** C7H6N*** C5H4N*** C6H5*** C4H5***