ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/C16H25NO2/c1-4-5-6-7-8-9-10-11-12-13-15(18)17-14-16(2,
3)19/h4-9,12-13,19H,10-11,14H2,1-3H3,(H,17,18)/b5-4+,7-6+,9-8-,13-12+/file?format=sdf&get3d=True  -- InChI=1S/C16H25NO2/c1-4-5-6-7-8-9-10-11-12-13-15(18)17-14-16(2,
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