7,11-Dioxa-3,15-diazaheptadecanediamide, N,N’-bis[4-[[[(1R,2R)-2-amino-1,2-diphenylethyl]amino]sulfonyl]phenyl]- 9-[[3-[[2-[[4-[[[(1R,2R)-2-amino-1,2-diphenylethyl]amino]sulfonyl]phenyl] amino]-2-o