ERROR opening https://cactus.nci.nih.gov/chemical/structure/c1ccc2c%28c1%29ccc3c2cc4ccc5ccccc5c4c3/file?format=sdf&get3d=True  -- c1ccc2c%28c1%29ccc3c2cc4ccc5ccccc5c4c3 could not be loaded.