LYS-TRP-LYS ACETATE lysyl-tryptophyl-alpha-lysine H-Lys-Trp-Lys-OH lysine-tryptophane-lysine acetate Lys-Trp-Lys L-Lysine, L-lysyl-L-tryptophyl- Lysyltryptophyllysine (S)-6-Amino-2-((S)-2-((S)-2,6-diaminohexanamido)-3-(1H-indol-3-yl)propanamido)hexanoic acid