is tautomer of anhydrotetracycline zwitterion anhydrotetracycline zwitterion (1S,4aS,12aS)-3-carbamoyl-1-(dimethylammonio)-4a,6,7-trihydroxy-11-methyl-4,5-dioxo-1,4,4a,5,12,12a-hexahydrotetracen-2-olate 0 426.143 426.41930 C22H22N2O7 CHEBI:58032 CXCVEERYMJZMMM-DOCRCCHOSA-N InChI=1S/C22H22N2O7/c1-8-9-5-4-6-12(25)13(9)17(26)14-10(8)7-11-16(24(2)3)18(27)15(21(23)30)20(29)22(11,31)19(14)28/h4-6,11,16,25-27,31H,7H2,1-3H3,(H2,23,30)/t11-,16-,22-/m0/s1 Zwitterionic form of anhydrotetracycline arising from transfer of a proton from the 2-hydroxy to the tertiary amino group; major species at pH 7.3. [H][C@@]12Cc3c(C)c4cccc(O)c4c(O)c3C(=O)[C@]1(O)C(=O)C(C(N)=O)=C([O-])[C@H]2[NH+](C)C anhydrotetracycline chebi_ontology