[{"from": "human", "value": "Please give me some details about this molecule. [C][C][Branch1][C][C][C@@][Branch2][Ring1][#Branch2][C][C][C][N][Branch1][C][C][C][C][C][=C][C][=Branch1][#Branch2][=C][Branch1][Branch1][C][=C][Ring1][=Branch1][O][C][O][C][Branch1][Ring1][C][#N][C][=C][C][=Branch1][#Branch2][=C][Branch1][Branch1][C][=C][Ring1][=Branch1][O][C][O][C].[Cl]"}, {"from": "gpt", "value": "The molecule is a hydrochloride salt resulting from the reaction of equimolar amounts of dexverapamil and hydrogen chloride. It competitively inhibits the multidrug resistance efflux pump P-glycoprotein (MDR-1, EC 3.6.3.44), thereby potentially increasing the effectiveness of a wide range of antineoplastic drugs which are inactivated by MDR-1 mechanisms. Dexverapamil hydrochloride exhibits lower calcium antagonistic activity and toxicity than racemic verapamil hydrochloride. It has a role as an EC 3.6.3.44 (xenobiotic-transporting ATPase) inhibitor. It contains a dexverapamil(1+). It is an enantiomer of a (S)-verapamil hydrochloride."}]