ERROR opening https://cactus.nci.nih.gov/chemical/structure/O%3DC1NC%28%3DO%29SC1Cc4ccc3OC%28Cc2ccccc2%29CCc3c4/file?format=sdf&get3d=True  -- O%3DC1NC%28%3DO%29SC1Cc4ccc3OC%28Cc2ccccc2%29CCc3c4 could not be loaded.