Molecule HB15A Atom N2, formal charge = 1 Molecule HB16A Atom O5, formal charge = -1 Molecule HB20A Atom N5, formal charge = 1 Atom O1, formal charge = -1 Molecule HB28A Atom N2, formal charge = 1 Molecule HB40A Atom N3, formal charge = 1 Molecule HB41A Atom N1, formal charge = 1 Molecule HB41B Atom N1, formal charge = 1 Molecule HB42A Atom N1, formal charge = 1 Molecule HB45A Atom N1, formal charge = 1 Atom O1, formal charge = -1