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