ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/C5H11NO4/c6-3-2(7)1-10-5(9)4(3)8/h2-5,7-9H,1,6H2/t2-,3-,4+,5?/m1/s1/file?format=sdf&get3d=True -- InChI=1S/C5H11NO4/c6-3-2(7)1-10-5(9)4(3)8/h2-5,7-9H,1,6H2/t2-,3-,4+,5?/m1/s1 could not be loaded.