76166-64-8 L-Tryptophan, N-(N-phosphono-L-valyl)- N(alpha)-Phosphorylvalyltryptophan N-Aplpha-phosphoryl-valyl-tryptophan N-alpha-Phosphoryl-L-valyl-L-tryptophan NAPVT Nalpha-Phosphoryl-val-trp Nalpha-Phosphorylvalyltryptophan