ERROR opening https://cactus.nci.nih.gov/chemical/structure/C1C2CC3CC1CC%28C3%29%28C2%29%5BC%40%40H%5D%28N%29C/file?format=sdf&get3d=True -- C1C2CC3CC1CC%28C3%29%28C2%29%5BC%40%40H%5D%28N%29C could not be loaded.