AR-A 2 is a selective 5-HT1B receptor antagonist, with a high affinity to guinea pig cortex 5HT1B/1D and recombinant guinea pig 5-HT1B receptors (Ki: 0.24 and 0.47 nM) and with 10-fold lower affinity to guinea pig 5-HT1D receptor (Ki: 5 nM).
Cariprazine-D6 is a deuterium-labeled Cariprazine. Cariprazine (T4577) is an antipsychotic agent (D3 receptors,Ki: 0.085 nM; D2 receptors,Ki: 0.49 nM).