6-Arg-7-phenh2-leu-enkephalin 6-Arginyl-7-phenylalaninamide-leucine enkephalin 80690-78-4 Enkephalin-leu, arg(6)-phenh2(7)- Enkephalin-leu, arginyl(6)-phenylalaninamide(7)- Leapaa Leu-enkephalin, arg(6)-phenh2(7)- Leucine-enkephalin, arg(6)-phenh2(7)- alpha-Neoendorphin, 7-L-phenylalaninamide-8-de-L-tyrosine-9-de-L-proline-10-de-L-lysine-