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File:Butane 3D spacefill.png - Wikipedia
The Slow Mo Guys, The Rooster Teeth Wiki
Accelerator
File:Melamine-3D-balls-2.png - Wikipedia
Newman Projection of Butane (and Gauche Conformation)
KS0077(78,79)Super Learning Kit for Arduino - Keyestudio Wiki
Hydrocarbon
Maleic Acid, C4H4O4
File:Triphenylphosphine-sulfide-3D-balls.png - Wikipedia
File:Butane-anti-Newman-3D-balls.png - Wikimedia Commons