ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/2Ca.2H2O4S.H2O/c;;2*1-5(2,3)4;/h;;2*(H2,1,2,3,4);1H2/q2* 2;;;/p-4/file?format=sdf&get3d=True  -- InChI=1S/2Ca.2H2O4S.H2O/c;;2*1-5(2,3)4;/h;;2*(H2,1,2,3,4);1H2/q2* 2;;;/p-4 could not be loaded.