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Anaxirone is a synthetic triepoxide alkylating agent with potential antineoplastic activity. Anaxirone alkylates DNA via actual or derived epoxide groups, resulting in inhibition of DNA synthesis. This agent has been shown to exhibit a broad spectrum of antineoplastic activity against experimental tumors, including those resistant to other alkylating agents.

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).