ERROR opening https://cactus.nci.nih.gov/chemical/structure/%26%2391%3BLi%2B%26%2393%3B.CC1%28CCCC%28%26%2391%3BN-%26%2393%3B1%29%28C%29C%29C/file?format=sdf&get3d=True  -- %26%2391%3BLi%2B%26%2393%3B.CC1%28CCCC%28%26%2391%3BN-%26%2393%3B1%29%28C%29C%29C could not be loaded.