Question: Please provide a description of this drug's mechanism of action.
 The Chemical has the SMILES CN1CC2CCN(c3ccc(-c4ccc(-n5ncccc5=O)cc4)cc3)C2C1.
Result: Histamine H3 receptor antagonist
{#Question|Q!}: {quest#}
{#Constraint:|Description:|!} The {#Molecule|Compound|Chemical!} {#has the|can be represented with the!} {SMILES__description} {SMILES#}.
{#Answer|Result|Answer!}: {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.