ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/2C6H8O2.Ca/c2*1-2-3-4-5-6(7)8;/h2*2-5H,1H3,(H,7,8);/q;; 2/p-2/b2*3-2 ,5-4 ;/file?format=sdf&get3d=True  -- InChI=1S/2C6H8O2.Ca/c2*1-2-3-4-5-6(7)8;/h2*2-5H,1H3,(H,7,8);/q;; 2/p-2/b2*3-2 ,5-4 ; could not be loaded.