is conjugate base of organic anion tetracycline tetracycline(1-) (1S,4aS,11S,11aS,12aS)-3-carbamoyl-1-(dimethylazaniumyl)-4a,7,11-trihydroxy-11-methyl-4,6-dioxo-1,4,4a,6,11,11a,12,12a-octahydrotetracene-2,5-diolate -1 443.145 443.42660 An organic anion that is the conjugate base of tetracycline obtained by deprotonation of the two enolic hydroxy groups and protonation of the tertiary amino group. C22H23N2O8 CHEBI:71392 InChI=1S/C22H24N2O8/c1-21(31)8-5-4-6-11(25)12(8)16(26)13-9(21)7-10-15(24(2)3)17(27)14(20(23)30)19(29)22(10,32)18(13)28/h4-6,9-10,15,25,27-28,31-32H,7H2,1-3H3,(H2,23,30)/p-1/t9-,10-,15-,21+,22-/m0/s1 OFVLGDICTFRJMM-WESIUVDSSA-M [H][C@@]12C[C@@]3([H])C(C(=O)c4c(O)cccc4[C@@]3(C)O)=C([O-])[C@]1(O)C(=O)C(C(N)=O)=C([O-])[C@H]2[NH+](C)C chebi_ontology tetracycline anion tetracycline zwitterion