ERROR opening https://cactus.nci.nih.gov/chemical/structure/O2c1cccc5c1c4c3c2ccc6c3c%28Oc4cc5%29ccc6/file?format=sdf&get3d=True  -- O2c1cccc5c1c4c3c2ccc6c3c%28Oc4cc5%29ccc6 could not be loaded.