preferred_name: L-aspartyl-L-lysine(out) => L-aspartyl-L-lysine(in)
preferred_name_lc: l-aspartyl-l-lysine(out) => l-aspartyl-l-lysine(in)
label: L-aspartyl-L-lysine(out) => L-aspartyl-L-lysine(in)
label_lc: l-aspartyl-l-lysine(out) => l-aspartyl-l-lysine(in)