ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/CH6NO3P/c2-1-6(3,4)5/h1-2H2,(H2,3,4,5)/file?format=sdf&get3d=True  -- InChI=1S/CH6NO3P/c2-1-6(3,4)5/h1-2H2,(H2,3,4,5) could not be loaded.