ERROR opening https://cactus.nci.nih.gov/chemical/structure/Oc4ccc1c%28cccc1%29c4c2c3c%28ccc2O%29cccc3/file?format=sdf&get3d=True  -- Oc4ccc1c%28cccc1%29c4c2c3c%28ccc2O%29cccc3 could not be loaded.