2,6-diaminohexanoic acid 70-54-2 56-87-1 NCGC00166296-01 NCGC00164527-01 lysine acid lysine L-lys L-lysine LYS (+-)-2,6-Diaminohexanoic acid (+-)-Lysine (RS)-Lysine DL-Lysine DL-alpha,epsilon-Diaminocaproic acid EINECS 200-740-6 LYSINE (DL) Lysine, DL- Lysin alpha,epsilon-diaminocaproic acid CHEBI:25094 C16440 ()-2,6-Diaminocaproic acid L2513_SIGMA 2-amino-6-azaniumylhexanoate 2-amino-6-azaniumyl-hexanoate 2-amino-6-ammoniohexanoate 2-amino-6-ammonio-hexanoate