Q: Please provide a description of this drug's mechanism of action.
Constraint: The Molecule can be represented with the SMILES O=C(NC1CC1)c1cn(-c2cccc(C#Cc3ccc[n+]([O-])c3)c2)c2ncccc2c1=O.
Answer: Phosphodiesterase 4 inhibitor
{#Question|Q!}: {quest#}
{#Constraint:|Description:|!} The {#Molecule|Compound|Chemical!} {#has the|can be represented with the!} {SMILES__description} {SMILES#}.
{#Answer|Result|Answer!}: {answ#}
O=C(NC1CC1)c1cn(-c2cccc(C#Cc3ccc[n+]([O-])c3)c2)c2ncccc2c1=O
O=C(NC1CC1)c1cn(-c2cccc(C#Cc3ccc[n+]([O-])c3)c2)c2ncccc2c1=O
N-cyclopropyl-1-[3-[2-(1-oxidopyridin-1-ium-3-yl)ethynyl]phenyl]-4-oxo-1,8-naphthyridine-3-carboxamide
Please provide a description of this drug's mechanism of action.