Dinorfin B je forma dinorfina. On je endogeniopioidni peptid. Njegova sekvenca je:
Tyr - Gly - Gly - Phe - Leu - Arg - Arg - Gln - Phe - Lys - Leu - Leu - Thr.
^Evan E. Bolton; Yanli Wang; Paul A. Thiessen; Stephen H. Bryant (2008). „Chapter 12 PubChem: Integrated Platform of Small Molecules and Biological Activities”. Annual Reports in Computational Chemistry. 4: 217—241. doi:10.1016/S1574-1400(08)00012-1.