Standard InChI: InChI=1S/C33H39N5O5/c1-35-30(40)27(20-22-9-4-2-5-10-22)36-31(41)28(21-23-11-6-3-7-12-23)37-32(42)29-13-8-18-38(29)33(43)26(34)19-24-14-16-25(39)17-15-24/h2-7,9-12,14-17,26-29,39H,8,13,18-21,34H2,1H3,(H,35,40)(H,36,41)(H,37,42)/t26-,27-,28-,29-/m0/s1
1.Wang CL, Yao JL, Yu Y, Shao X, Cui Y, Liu HM, Lai LH, Wang R.. (2008) Structure-activity study of endomorphin-2 analogs with C-terminal modifications by NMR spectroscopy and molecular modeling., 16 (12):[PMID:18490168][10.1016/j.bmc.2008.05.001]