Cyclobutadiene Chemeo Renderer - https://www.chemeo.com More info - https://www.chemeo.com/cid/38-727-3 4 4 0 0 0 0 0 0 0 0999 V2000 1.0607 -0.0000 0.0000 C 0 0 0 0 0 0 0 0 0 0 0 0 -0.0000 -1.0607 0.0000 C 0 0 0 0 0 0 0 0 0 0 0 0 -1.0607 0.0000 0.0000 C 0 0 0 0 0 0 0 0 0 0 0 0 0.0000 1.0607 0.0000 C 0 0 0 0 0 0 0 0 0 0 0 0 1 2 2 0 2 3 1 0 3 4 2 0 4 1 1 0 M END