ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/2C20H14N2O4S.Ca/c2*23-18-12-10-13-5-1-3-7-15(13)19(18)22-21-17-11-9-14-6-2-4-8-16(14)20(17)27(24,25)26;/h2*1-12,23H,(H,24,25,26);/q;;+2/p-2/file?format=sdf&get3d=True  -- InChI=1S/2C20H14N2O4S.Ca/c2*23-18-12-10-13-5-1-3-7-15(13)19(18)22-21-17-11-9-14-6-2-4-8-16(14)20(17)27(24,25)26;/h2*1-12,23H,(H,24,25,26);/q;;+2/p-2 could not be loaded.