ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/2BO2.Mg/c2*2-1-3;/q2*-1;+2/file?format=sdf&get3d=True -- InChI=1S/2BO2.Mg/c2*2-1-3;/q2*-1;+2 could not be loaded.