ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/C46H38N4O2/c1-3-51-39-31-19-17-29-37(39)45-47-43(35-25-13-7-14-26-35)44(36-27-15-8-16-28-36)50(45)46(38-30-18-20-32-40(38)52-4-2)48-41(33-21-9-5-10-22-33)42(49-46)34-23-11-6-12-24-34/h5-32H,3-4H2,1-2H3/file?format=sdf&get3d=True  -- InChI=1S/C46H38N4O2/c1-3-51-39-31-19-17-29-37(39)45-47-43(35-25-13-7-14-26-35)44(36-27-15-8-16-28-36)50(45)46(38-30-18-20-32-40(38)52-4-2)48-41(33-21-9-5-10-22-33)42(49-46)34-23-11-6-12-24-34/h5-32H,3-4H2,1-2H3 could not be loaded.