More pictures of pyridinring
![Crystal Correlation Of Heterocyclic Imidazo[1,2-a]pyridine Analogues and Their Anticholinesterase Potential Evaluation | Scientific Reports](https://i0.wp.com/media.springernature.com/full/springer-static/image/art%3A10.1038%2Fs41598-018-37486-7/MediaObjects/41598_2018_37486_Fig1_HTML.png)
pyridinring
