ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/C12H18/c1-7-8(2)10(4)12(6)11(5)9(7)3/h1-6H3/file?format=sdf&get3d=True  -- InChI=1S/C12H18/c1-7-8(2)10(4)12(6)11(5)9(7)3/h1-6H3 could not be loaded.