ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/6CN.Fe.3H3N/c6*1-2;;;;/h;;;;;;;3*1H3/q6*-1; 3;;;/p 3/file?format=sdf&get3d=True -- InChI=1S/6CN.Fe.3H3N/c6*1-2;;;;/h;;;;;;;3*1H3/q6*-1; 3;;;/p 3 could not be loaded.