ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1/3C6H11.C2H2N3.Sn/c3*1-2-4-6-5-3-1;1-3-2-5-4-1;/h3*1H,2-6H2;1-2H;/q;;;-1;+1/rC20H35N3Sn/c1-4-10-18(11-5-1)24(23-17-21-16-22-23,19-12-6-2-7-13-19)20-14-8-3-9-15-20/h16-20H,1-15H2/file?format=sdf&get3d=True  -- InChI=1/3C6H11.C2H2N3.Sn/c3*1-2-4-6-5-3-1;1-3-2-5-4-1;/h3*1H,2-6H2;1-2H;/q;;;-1;+1/rC20H35N3Sn/c1-4-10-18(11-5-1)24(23-17-21-16-22-23,19-12-6-2-7-13-19)20-14-8-3-9-15-20/h16-20H,1-15H2 could not be loaded.