ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/C16H20O4/c1-14(2)5-10-4-11(7-17)15(9-18)8-16(15,12(10)6-14)13(19)20-3/h4,7,9-10,12H,5-6,8H2,1-3H3/t10-,12+,15-,16?/m1/s1/file?format=sdf&get3d=True  -- InChI=1S/C16H20O4/c1-14(2)5-10-4-11(7-17)15(9-18)8-16(15,12(10)6-14)13(19)20-3/h4,7,9-10,12H,5-6,8H2,1-3H3/t10-,12+,15-,16?/m1/s1 could not be loaded.