ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/6CN.Fe.4K.3H2O/c6*1-2;;;;;;;;/h;;;;;;;;;;;3*1H2/q6*-1; 2;4* 1;;;/file?format=sdf&get3d=True  -- InChI=1S/6CN.Fe.4K.3H2O/c6*1-2;;;;;;;;/h;;;;;;;;;;;3*1H2/q6*-1; 2;4* 1;;; could not be loaded.