122.8
[1]. Bak A, et al. Synthesis and evaluation of the physicochemical properties of esterase-sensitive cyclic prodrugs of opioid peptides using an (acyloxy)alkoxy linker. J Pept Res. 1999 Apr;5(4):9-402.
H02-H15-H19-H5
P21-P24-P270-P271-P280-P02+P52-P04+P40-P05+P51+P8-P0-P2+P4-P40+P2-P405-P501