ERROR opening https://cactus.nci.nih.gov/chemical/structure/C1%26%2361%3BCC%28%26%2361%3BC%28C%26%2361%3BC1Cl%29Cl%29OCCCC%28%26%2361%3BO%29O/file?format=sdf&get3d=True -- C1%26%2361%3BCC%28%26%2361%3BC%28C%26%2361%3BC1Cl%29Cl%29OCCCC%28%26%2361%3BO%29O could not be loaded.