73.13
[1]. Ayman El-Faham, et al. Novel proton acceptor immonium-type coupling reagents: application in solution and solid-phase peptide synthesis. Org Lett. 27 Oct 2;9(22):447-7.
H32+H312+H332-H31-H319-H33
P261-P264-P27-P271-P28-P32+P32-P34+P34-P33-P362+P364-P4-P1
GHS7