Task: Answer the following question about the molecule with SMILES CN1CC2CCN(c3ccc(-c4ccc(-n5ncccc5=O)cc4)cc3)C2C1.
Description: Please provide a description of this drug's mechanism of action.
Answer: Histamine H3 receptor antagonist
Task: Answer the following question about the molecule with {SMILES__description} {SMILES#}.
{#Description|Question|Request!}: {quest#}
{#Result|Answer|Completion!}: {answ#}
CN1CC2CCN(c3ccc(-c4ccc(-n5ncccc5=O)cc4)cc3)C2C1
CN1CC2CCN(c3ccc(-c4ccc(-n5ncccc5=O)cc4)cc3)C2C1
2-[4-[4-(5-methyl-2,3,3a,4,6,6a-hexahydropyrrolo[2,3-c]pyrrol-1-yl)phenyl]phenyl]pyridazin-3-one
Please provide a description of this drug's mechanism of action.