is conjugate acid of quinine(1+) (9R)-9-hydroxy-6'-methoxy-8alpha-cinchonan-1-ium 325.192 325.42470 C20H25N2O2 CHEBI:137041 InChI=1S/C20H24N2O2/c1-3-13-12-22-9-7-14(13)10-19(22)20(23)16-6-8-21-18-5-4-15(24-2)11-17(16)18/h3-6,8,11,13-14,19-20,23H,1,7,9-10,12H2,2H3/p+1/t13-,14-,19-,20+/m0/s1 LOUPRKONTZGTKE-WZBLMQSHSA-O The monoprotonated form of quinine, the predominant species at pH7.3. [H][C@]1(C[C@@H]2CC[N@H+]1C[C@@H]2C=C)[C@H](O)c1ccnc2ccc(OC)cc12 chebi_ontology quinine quinine organic cation cinchona alkaloid