ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1/C6H18OSi2/c1-8(2,3)7-9(4,5)6/h1-6H3/file?format=sdf&get3d=True  -- InChI=1/C6H18OSi2/c1-8(2,3)7-9(4,5)6/h1-6H3 could not be loaded.