ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/6CN.Co.3K/c6*1-2;;;;/q6*-1;+3;3*+1/file?format=sdf&get3d=True -- InChI=1S/6CN.Co.3K/c6*1-2;;;;/q6*-1;+3;3*+1 could not be loaded.