[{"from": "human", "value": "Please give me some details about this molecule. [C][C][Branch1][C][C][N][Branch2][Ring1][Ring2][C][C][C][C][O][C][C][=Branch1][C][=O][N][S][=Branch1][C][=O][=Branch1][C][=O][C][C][=C][N][=C][Branch1][#C][C][=Branch1][Ring2][=N][Ring1][=Branch1][C][=C][C][=C][C][=C][Ring1][=Branch1][C][=C][C][=C][C][=C][Ring1][=Branch1]"}, {"from": "gpt", "value": "The molecule is a member of the class of pyrazines that is N-(methanesulfonyl)-2-{4-[(propan-2-yl)(pyrazin-2-yl)amino]butoxy}acetamide carrying two additional phenyl substituents at positions 5 and 6 on the pyrazine ring. An orphan drug used for the treatment of pulmonary arterial hypertension. It is a prodrug for ACT-333679 (the free carboxylic acid). It has a role as an orphan drug, a prostacyclin receptor agonist, a platelet aggregation inhibitor, a vasodilator agent and a prodrug. It is a monocarboxylic acid amide, an ether, a member of pyrazines, an aromatic amine, a tertiary amino compound and a N-sulfonylcarboxamide. It is functionally related to an ACT-333679."}]