Aprocitentan D4 (ACT-132577 D4) is a deuterium-labeled Aprocitentan. Aprocitentan is a major and pharmacologically active metabolite of Macitentan. Aprocitentan is a dual ETA ETB antagonist (IC50s: 3.4 nM and 987 nM; pA2s: 6.7 and 5.5).
Ziprasidone, an antipsychotic agent, functions as a dualantagonist of 5-HT (serotonin) and dopamine receptors. Keto Ziprasidone represents an impurity found within Ziprasidone.