Figure 1.
Chemical structures of the paired (S)-(+) and (R)-(–) enantiomers of chloroquine (CQ) and hydroxychloroquine (HCQ). CAS Numbers: (S)-(+)-CQ: [58175-86-3]; (R)-(–)-CQ: [58175-87-4]; (S)-(+)-HCQ: [137433-24-0]; (R)-(–)-HCQ: [137433-23-9].
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