ERROR opening https://cactus.nci.nih.gov/chemical/structure/Oc1cc2c%28O%29cc%28O%29cc2%5Bo%2B%5Dc1c3cc%28OC%29c%28O%29cc3/file?format=sdf&get3d=True  -- Oc1cc2c%28O%29cc%28O%29cc2%5Bo%2B%5Dc1c3cc%28OC%29c%28O%29cc3 could not be loaded.