ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1/C15H16N2O2/c1-19-14-6-4-12(5-7-14)15(18,11-2-3-11)13-8-16-10-17-9-13/h4-11,18H,2-3H2,1H3/t15-/s3/file?format=sdf&get3d=True -- InChI=1/C15H16N2O2/c1-19-14-6-4-12(5-7-14)15(18,11-2-3-11)13-8-16-10-17-9-13/h4-11,18H,2-3H2,1H3/t15-/s3 could not be loaded.