ERROR opening https://cactus.nci.nih.gov/chemical/structure/n1cnc%28c2cc%28c%28cc12%29OCCOC%29OCCOC%29Nc1cc%28ccc1%29C%23C/file?format=sdf&get3d=True  -- n1cnc%28c2cc%28c%28cc12%29OCCOC%29OCCOC%29Nc1cc%28ccc1%29C%23C could not be loaded.