More pictures of pentalen
![Rh-catalyzed cyclization of carbamates–synthesis of a new heterocyclic system: tetrahydro-3H-4-oxa-2-thia-2b-azacyclopropa[cd]pentalen-3-one 2,2-dioxide | Chemical Papers](https://i0.wp.com/media.springernature.com/lw1200/springer-static/image/art%3A10.1007%2Fs11696-023-03006-9/MediaObjects/11696_2023_3006_Fig1_HTML.png)
pentalen
