ERROR opening https://cactus.nci.nih.gov/chemical/structure/CC1%3DCC%28NC%28CN2CCC%28C3%3DCC%3DCC%3DN3%29CC2%29%3DO%29%3DCC%3DC1/file?format=sdf&get3d=True  -- CC1%3DCC%28NC%28CN2CCC%28C3%3DCC%3DCC%3DN3%29CC2%29%3DO%29%3DCC%3DC1 could not be loaded.