n,n'-[(1s,4s,7r,11s,14s,17s,20r,24s)-11,24-diisopropyl-2,4,12,15,17,25-hexamethyl-3,6,10,13,16,19,23,26-octaoxo-9,22-dioxa-28,29-dithia-2,5,12,15,18,25-hexaazabicyclo[12.12.4]triacontane-7,20-diyl]diquinoxaline-2-carboxamide