ERROR opening https://cactus.nci.nih.gov/chemical/structure/OC%28c1ccccc1%29%28c2ccccc2%29CCCN3CCCCC3/file?format=sdf&get3d=True  -- OC%28c1ccccc1%29%28c2ccccc2%29CCCN3CCCCC3 could not be loaded.