ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/C31H52/c1-20(2)22-12-15-28(6)23(22)13-16-30(8)25(28)10-11-26-29(7)19-21(3)18-27(4,5)24(29)14-17-31(26,30)9/h20-21,24-26H,10-19H2,1-9H3/t21-,24?,25?,26?,28+,29+,30-,31-/m1/s1/file?format=sdf&get3d=True  -- InChI=1S/C31H52/c1-20(2)22-12-15-28(6)23(22)13-16-30(8)25(28)10-11-26-29(7)19-21(3)18-27(4,5)24(29)14-17-31(26,30)9/h20-21,24-26H,10-19H2,1-9H3/t21-,24?,25?,26?,28+,29+,30-,31-/m1/s1 could not be loaded.