ERROR opening https://cactus.nci.nih.gov/chemical/structure/O%3DC%28OCCOC%28%3DO%29C%28Oc1ccc%28Cl%29cc1%29%28C%29C%29c2cccnc2/file?format=sdf&get3d=True  -- O%3DC%28OCCOC%28%3DO%29C%28Oc1ccc%28Cl%29cc1%29%28C%29C%29c2cccnc2 could not be loaded.