SMILES: CC1=C2C=CC=C(C2=C(C3=C1C[C@H]4[C@@H](C(=O)C(=C([C@]4(C3=O)O)[O-])C(=O)N)[NH3+])O)O
Description: The molecule is a zwtterion obtained by transfer of a proton from the 2-hydroxy to the primary amino group of 4-amino-4-de(dimethylamino)anhydrotetracycline. It is the major microspecies at pH 7.3 (according to Marvin v 6.2.0.). It is a tautomer of a 4-amino-4-de(dimethylamino)anhydrotetracycline.