ERROR opening https://cactus.nci.nih.gov/chemical/structure/c3cc1OCOc1cc3C%28%3DO%29N%28c4ccccc4%29C2CCN%28CC2%29CCc5ccccc5/file?format=sdf&get3d=True  -- c3cc1OCOc1cc3C%28%3DO%29N%28c4ccccc4%29C2CCN%28CC2%29CCc5ccccc5 could not be loaded.