SMILES: CC[C@]1(C[C@@H](C2=C([C@H]1C(=O)[O-])C(=C3C(=C2O)C(=O)C4=C(C3=O)C=CC=C4OC)O)O[C@H]5C[C@@H]([C@@H]([C@@H](O5)C)O)[NH3+])O
Description: The molecule is a zwitterion obtained by transfer of a proton from the carboxy to the primary amino group of 10-carboxy-13-deoxydaunorubicin; major species at pH 7.3. It is a tautomer of a 10-carboxy-13-deoxydaunorubicin.