ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI%3DInChI%3D1S/C2H8NO2PS/c1-5-6%283%2C4%297-2/h1-2H3%2C%28H2%2C3%2C4%29/file?format=sdf&get3d=True -- InChI%3DInChI%3D1S/C2H8NO2PS/c1-5-6%283%2C4%297-2/h1-2H3%2C%28H2%2C3%2C4%29 could not be loaded.