ERROR opening https://cactus.nci.nih.gov/chemical/structure/OCCOCCN1CCN%28CC1%29C1%3DNc2ccccc2Sc2ccccc12/file?format=sdf&get3d=True  -- OCCOCCN1CCN%28CC1%29C1%3DNc2ccccc2Sc2ccccc12 could not be loaded.