ERROR opening https://cactus.nci.nih.gov/chemical/structure/c2ccc%28O%29c1c2ccc3c1c%28OC%29cc%28O%29c3/file?format=sdf&get3d=True  -- c2ccc%28O%29c1c2ccc3c1c%28OC%29cc%28O%29c3 could not be loaded.