ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI%3DInChI%3D1S/Mg.H2O4S/c%3B1-5%282%2C3%294/h%3B%28H2%2C1%2C2%2C3%2C4%29/q%202%3B/p-2/file?format=sdf&get3d=True -- InChI%3DInChI%3D1S/Mg.H2O4S/c%3B1-5%282%2C3%294/h%3B%28H2%2C1%2C2%2C3%2C4%29/q%202%3B/p-2 could not be loaded.