ChemSpider is a free web site that allows you to look up the chemical structure of countless molecules. Check it out! Search a molecule of you choice, and the site will show you the molecular structure in two dimensions. Click on the 3D tab, and it opens a new window with the structure in three dimensions! Use your mouse to rotate the structure and get a better look from any angle. Right-click on the 3D image for more options.Check out this 3D structure of testosterone.
