ERROR opening https://cactus.nci.nih.gov/chemical/structure/C1%3DCC%28%3DC%28C%3DC1%5BAs%5D%3DO%29N%29O.Cl/file?format=sdf&get3d=True -- C1%3DCC%28%3DC%28C%3DC1%5BAs%5D%3DO%29N%29O.Cl could not be loaded.