ERROR opening https://cactus.nci.nih.gov/chemical/structure/CN%28C%29CCOC%28c1ccccc1%29c2ccc%28cc2%29OC/file?format=sdf&get3d=True  -- CN%28C%29CCOC%28c1ccccc1%29c2ccc%28cc2%29OC could not be loaded.