Keywords: Acetylene-2D-skeletal.svg Acetylene 2D skeletal structure Based on the public-domain Image Acetylene-2D-skeletal png by User Benjah-bmm27 00 31 August 21 2006 User Erin Silversmith Acetylene-2D svg Acetylene-2D png Acetylene png Acétylène PNG Ethin jpg Etyn png Ethyne-2D-flat png Acetylene |