Standard InChI: InChI=1S/C40H52N8O7/c1-27(43-39(54)33(41)24-30-12-14-32(49)15-13-30)38(53)42-26-37(52)45-34(25-29-10-6-3-7-11-29)40(55)47-46-36(51)17-16-35(50)44-31-19-22-48(23-20-31)21-18-28-8-4-2-5-9-28/h2-15,27,31,33-34,49H,16-26,41H2,1H3,(H,42,53)(H,43,54)(H,44,50)(H,45,52)(H,46,51)(H,47,55)/t27-,33+,34+/m1/s1
1.Lee YS, Petrov R, Park CK, Ma SW, Davis P, Lai J, Porreca F, Vardanyan R, Hruby VJ.. (2007) Development of novel enkephalin analogues that have enhanced opioid activities at both mu and delta opioid receptors., 50 (22):[PMID:17927164][10.1021/jm061465o]