ERROR opening https://cactus.nci.nih.gov/chemical/structure/c32c%28c1ccccc1c%28c2ccc4c3cccc4%29C%29C/file?format=sdf&get3d=True -- c32c%28c1ccccc1c%28c2ccc4c3cccc4%29C%29C could not be loaded.