is conjugate acid of tertiary ammonium ion chloroquine(2+) C18H28ClN3 [NH+]1=CC=C(C=2C1=CC(Cl)=CC2)NC(CCC[NH+](CC)CC)C 7-chloro-4-{[5-(diethylazaniumyl)pentan-2-yl]amino}quinolinium WHTVZRBIWZFKQO-UHFFFAOYSA-P 321.19608 chloroquine dication InChI=1S/C18H26ClN3/c1-4-22(5-2)12-6-7-14(3)21-17-10-11-20-18-13-15(19)8-9-16(17)18/h8-11,13-14H,4-7,12H2,1-3H3,(H,20,21)/p+2 +2 CHEBI:149484 chebi_ontology di-protonated chloroquine A quinolinium ion obtained by protonation of the quinoline nitrogen and tertiary amino group of the antimalarial drug chloroquine. It is the major species at pH 7.3. 321.890 PMID:25693996 Chloroquine chloroquine quinolinium ion