ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/C52H48P2/c1-33-21-34(2)26-43(25-33)53(44-27-35(3)22-36(4)28-44)49-19-17-41-13-9-11-15-47(41)51(49)52-48-16-12-10-14-42(48)18-20-50(52)54(45-29-37(5)23-38(6)30-45)46-31-39(7)24-40(8)32-46/h9-32H,1-8H3/file?format=sdf&get3d=True  -- InChI=1S/C52H48P2/c1-33-21-34(2)26-43(25-33)53(44-27-35(3)22-36(4)28-44)49-19-17-41-13-9-11-15-47(41)51(49)52-48-16-12-10-14-42(48)18-20-50(52)54(45-29-37(5)23-38(6)30-45)46-31-39(7)24-40(8)32-46/h9-32H,1-8H3 could not be loaded.