ERROR opening https://cactus.nci.nih.gov/chemical/structure/COC1C%28OC%28C%28C1O%29O%29OC2C%28OC%28C%28C2O%29O%29OC%29CO%29CO/file?format=sdf&get3d=True  -- COC1C%28OC%28C%28C1O%29O%29OC2C%28OC%28C%28C2O%29O%29OC%29CO%29CO could not be loaded.