ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1/C15H20O4/c1-7-6-10-12(8(2)14(18)19-10)13(17)15(3)9(7)4-5-11(15)16/h4-5,7-10,12-13,17H,6H2,1-3H3/t7-,8-,9-,10+,12?,13-,15-/m0/s1/file?format=sdf&get3d=True -- InChI=1/C15H20O4/c1-7-6-10-12(8(2)14(18)19-10)13(17)15(3)9(7)4-5-11(15)16/h4-5,7-10,12-13,17H,6H2,1-3H3/t7-,8-,9-,10+,12?,13-,15-/m0/s1 could not be loaded.