ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/C22H28N4/c1-14(2)22-23-7-8-26(22)13-15-9-18-17-5-4-6-19-21(17)16(11-24-19)10-20(18)25(3)12-15/h4-8,11,14-15,18,20,24H,9-10,12-13H2,1-3H3/t15-,18?,20-/m1/s1/file?format=sdf&get3d=True -- InChI=1S/C22H28N4/c1-14(2)22-23-7-8-26(22)13-15-9-18-17-5-4-6-19-21(17)16(11-24-19)10-20(18)25(3)12-15/h4-8,11,14-15,18,20,24H,9-10,12-13H2,1-3H3/t15-,18?,20-/m1/s1 could not be loaded.