File:Pirido 2,1-j quinolina.png
![File:Pirido 2,1-j quinolina.png](https://upload.wikimedia.org/wikipedia/commons/thumb/1/1d/Pirido_2%2C1-j_quinolina.png/570px-Pirido_2%2C1-j_quinolina.png?20150202210410)
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