ERROR opening https://cactus.nci.nih.gov/chemical/structure/CC1%3DCC%3DC%28C%3DC1%29CC2%28CCN%28CC2%29CCOC3%3DCC%3DC%28C%3DC3%29O%29O/file?format=sdf&get3d=True -- CC1%3DCC%3DC%28C%3DC1%29CC2%28CCN%28CC2%29CCOC3%3DCC%3DC%28C%3DC3%29O%29O could not be loaded.