ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/C15H18N2O/c1-14(2,9-16)12-5-11(8-18)6-13(7-12)15(3,4)10-17/h5-7,18H,8H2,1-4H3/file?format=sdf&get3d=True  -- InChI=1S/C15H18N2O/c1-14(2,9-16)12-5-11(8-18)6-13(7-12)15(3,4)10-17/h5-7,18H,8H2,1-4H3 could not be loaded.