ERROR opening https://cactus.nci.nih.gov/chemical/structure/CC1%28CCC%28C1%28CN2C%3DNC%3DN2%29O%29CC3%3DCC%3DC%28C%3DC3%29Cl%29C/file?format=sdf&get3d=True -- CC1%28CCC%28C1%28CN2C%3DNC%3DN2%29O%29CC3%3DCC%3DC%28C%3DC3%29Cl%29C could not be loaded.