ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/2C3H6O2.Ca/c2*1-2-3(4)5;/h2*2H2,1H3,(H,4,5);/q;; 2/p-2/file?format=sdf&get3d=True  -- InChI=1S/2C3H6O2.Ca/c2*1-2-3(4)5;/h2*2H2,1H3,(H,4,5);/q;; 2/p-2 could not be loaded.