137201-62-8 L-Threonine, N-(N-(1-(N-(N-(N-L-leucyl-L-valyl)-L-valyl)-L-tyrosyl)-L-prolyl)-L-tryptophyl)- Leu-val-val-tyr-pro-trp-thr Leucyl-valyl-valyl-tyrosyl-prolyl-tryptophyl-threonine Spinorphin