ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/3C2H2O4.Fe.3K/c3*3-1(4)2(5)6;;;;/h3*(H,3,4)(H,5,6);;;;/q;;; 3;3* 1/p-6/file?format=sdf&get3d=True  -- InChI=1S/3C2H2O4.Fe.3K/c3*3-1(4)2(5)6;;;;/h3*(H,3,4)(H,5,6);;;;/q;;; 3;3* 1/p-6 could not be loaded.