ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/H4O7P2.2Sr/c1-8(2,3)7-9(4,5)6;;/h(H2,1,2,3)(H2,4,5,6);;/q;2* 2/p-4/file?format=sdf&get3d=True  -- InChI=1S/H4O7P2.2Sr/c1-8(2,3)7-9(4,5)6;;/h(H2,1,2,3)(H2,4,5,6);;/q;2* 2/p-4 could not be loaded.