ERROR opening https://cactus.nci.nih.gov/chemical/structure/OC%28c1ccccc1%29%28c2ccccc2%29C4C3CCN%28CC3%29C4/file?format=sdf&get3d=True  -- OC%28c1ccccc1%29%28c2ccccc2%29C4C3CCN%28CC3%29C4 could not be loaded.