This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Benzocyclobutadiene.svg Skeletal formula of the benzocyclobutadiene simple aromatic ring made it myself with the free software program ChemTool isilanes Antiaromatics Polycyclic nonaromatic hydrocarbons Fourmembered rings
Page 2023 Free-images.com. All images are Public Domain