preferred_name: 2 L-arginine => N-amidino-L-arginine + L-ornithine
preferred_name_lc: 2 l-arginine => n-amidino-l-arginine + l-ornithine
label: 2 L-arginine => N-amidino-L-arginine + L-ornithine
label_lc: 2 l-arginine => n-amidino-l-arginine + l-ornithine