ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI%3DInChI%3D1S/6C2H4O2.Ca.2Mg/c6%2A1-2%283%294%3B%3B%3B/h6%2A1H3%2C%28H%2C3%2C4%29%3B%3B%3B/q%3B%3B%3B%3B%3B%3B3%2A%202/p-6/file?format=sdf&get3d=True  -- InChI%3DInChI%3D1S/6C2H4O2.Ca.2Mg/c6%2A1-2%283%294%3B%3B%3B/h6%2A1H3%2C%28H%2C3%2C4%29%3B%3B%3B/q%3B%3B%3B%3B%3B%3B3%2A%202/p-6 could not be loaded.