ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/Cu.4H3N.H2O4S.H2O/c;;;;;1-5(2,3)4;/h;4*1H3;(H2,1,2,3,4);1H2/q 2;;;;;;/p-2/file?format=sdf&get3d=True -- InChI=1S/Cu.4H3N.H2O4S.H2O/c;;;;;1-5(2,3)4;/h;4*1H3;(H2,1,2,3,4);1H2/q 2;;;;;;/p-2 could not be loaded.