ERROR opening https://cactus.nci.nih.gov/chemical/structure/C1CN2CC3%3DCCOC4CC%28%3DO%29N5C6C4C3CC2C61C7%3DCC%3DCC%3DC75/file?format=sdf&get3d=True  -- C1CN2CC3%3DCCOC4CC%28%3DO%29N5C6C4C3CC2C61C7%3DCC%3DCC%3DC75 could not be loaded.