Nalidixic acid
（重定向自Wintomylon）
![](/Images/godic/202502/21/Nalidixic_acid1232.png")
![Naldixic acid synthesis:[13][14]](/Images/godic/202502/21/Naldixic_acid_synthesis1232.png")
Nalidixic acid (tradenames Nevigramon, Neggram, Wintomylon and WIN 18,320) is the first of the synthetic quinolone antibiotics.
In a technical sense, it is a naphthyridone, not a quinolone: its ring structure is a 1,8-naphthyridine nucleus that contains two nitrogen atoms, unlike quinoline, which has a single nitrogen atom.