ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/C43H52N4O5/c1-7-24-17-23-20-43(42(49)52-6)39-28(15-16-47(21-23)40(24)43)27-13-14-34(50-4)36(38(27)45-39)31-18-29-25(8-2)22-46(3)33(35(29)41(48)51-5)19-30-26-11-9-10-12-32(26)44-37(30)31/h8-14,23-24,29,31,33,35,40,44-45H,7,15-22H2,1-6H3/b25-8 /file?format=sdf&get3d=True  -- InChI=1S/C43H52N4O5/c1-7-24-17-23-20-43(42(49)52-6)39-28(15-16-47(21-23)40(24)43)27-13-14-34(50-4)36(38(27)45-39)31-18-29-25(8-2)22-46(3)33(35(29)41(48)51-5)19-30-26-11-9-10-12-32(26)44-37(30)31/h8-14,23-24,29,31,33,35,40,44-45H,7,15-22H2,1-6H3/b25-8  could not be loaded.