ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/2C3H6O3.Ca/c2*1-2(4)3(5)6/file?format=sdf&get3d=True  -- InChI=1S/2C3H6O3.Ca/c2*1-2(4)3(5)6 could not be loaded.