ERROR opening https://cactus.nci.nih.gov/chemical/structure/COc1c%28OC%29cc2c%28c1O%29C%28C%29%5BN%2B%5D%28CC2%29%28C%29C/file?format=sdf&get3d=True  -- COc1c%28OC%29cc2c%28c1O%29C%28C%29%5BN%2B%5D%28CC2%29%28C%29C could not be loaded.