6-Arg-met-enkephalin 76310-14-0 Enkephalin-met, arg(6)- Enkephalin-met, arginine(6)- L-Arginine, N2-(N-(N-(N-(N-L-tyrosylglycyl)glycyl)-L-phenylalanyl)-L-methionyl)- Met-enk-A Met-enkephalin, arg(6)- Methionine-enkephalin, arg(6)-