ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/C6H10N2O4/c7-2(1-9)3-4(10)5(11)6(12)8-3/h1-5,10-11H,7H2,(H,8,12)/t2?,3-,4+,5+/m1/s1/file?format=sdf&get3d=True  -- InChI=1S/C6H10N2O4/c7-2(1-9)3-4(10)5(11)6(12)8-3/h1-5,10-11H,7H2,(H,8,12)/t2?,3-,4+,5+/m1/s1 could not be loaded.