Keywords: 2-Methylpropene 3D.png Ball-and-stick model of 2-methylpropene isobutylene Created using http //www accelrys com/products/downloads/ds_visualizer/index html Accelrys DS Visualizer Pro 1 7 GIMP and OptiPNG Own 2008-01-11 Fvasconcellos 23 25 11 January 2008 UTC Isobutylene |