1H-Indole-3-alanine 73-22-3 EH 121 L-Trp L-Tryptophan NCI-C01729 NSC13119 Pacitron Propionic acid, 2-amino-3-indol-3-yl Tryptophan Tryptophan, L- WLN: T56 BMJ D1YZVQ -L