C16037  Leumorphin
     C01574  Dynorphin A
     C16135  Dynorphin B
     C16039  Neoendorphin alpha
     C16040  Neoendorphin beta
     C16041  Leu-enkephalin
     C11684  Met-enkephalin
     C16042  Met-enkephalin-Arg-Gly-Leu
     C16043  Met-enkephalin-Arg-Phe
     C16108  Adrenorphin
     C15890  Endomorphin-1
     C15891  Endomorphin-2
     C16044  Nociceptin
     C15871  Nocistatin