ERROR opening https://cactus.nci.nih.gov/chemical/structure/OC1%3DC%28Oc2ccccc2C1%3DO%29c3ccccc3/file?format=sdf&get3d=True  -- OC1%3DC%28Oc2ccccc2C1%3DO%29c3ccccc3 could not be loaded.