ERROR opening https://cactus.nci.nih.gov/chemical/structure/O1c2c%28OC1%29cc3c%28c2%29CCN%28C3O%29C/file?format=sdf&get3d=True  -- O1c2c%28OC1%29cc3c%28c2%29CCN%28C3O%29C could not be loaded.