preferred_name: N-amidino-L-valine + L-ornithine => L-valine + L-arginine
preferred_name_lc: n-amidino-l-valine + l-ornithine => l-valine + l-arginine
label: N-amidino-L-valine + L-ornithine => L-valine + L-arginine
label_lc: n-amidino-l-valine + l-ornithine => l-valine + l-arginine