ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI%3DInChI%3D1S/C6H18N3OP/c1-7%282%2911%2810%2C8%283%294%299%285%296/h1-6H3/file?format=sdf&get3d=True  -- InChI%3DInChI%3D1S/C6H18N3OP/c1-7%282%2911%2810%2C8%283%294%299%285%296/h1-6H3 could not be loaded.