ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/C52H48P2/c1-51(2,3)53-31-37-25-23-33-15-7-11-19-39(33)45(37)47-41-21-13-9-17-35(41)27-29-43(47)49(53)50-44-30-28-36-18-10-14-22-42(36)48(44)46-38(32-54(50)52(4,5)6)26-24-34-16-8-12-20-40(34)46/h7-30,49-50H,31-32H2,1-6H3/t49-,50-,53?,54?/m0/s1/file?format=sdf&get3d=True  -- InChI=1S/C52H48P2/c1-51(2,3)53-31-37-25-23-33-15-7-11-19-39(33)45(37)47-41-21-13-9-17-35(41)27-29-43(47)49(53)50-44-30-28-36-18-10-14-22-42(36)48(44)46-38(32-54(50)52(4,5)6)26-24-34-16-8-12-20-40(34)46/h7-30,49-50H,31-32H2,1-6H3/t49-,50-,53?,54?/m0/s1 could not be loaded.