ERROR opening https://cactus.nci.nih.gov/chemical/structure/COc1cc%28C%23N%29c%28OC%29cc1CCNCc2ccccc2O/file?format=sdf&get3d=True  -- COc1cc%28C%23N%29c%28OC%29cc1CCNCc2ccccc2O could not be loaded.