preferred_name: arginine + H2O => ornithine + urea [ARG2] (Mus musculus)
preferred_name_lc: arginine + h2o => ornithine + urea [arg2] (mus musculus)
label: arginine + H2O => ornithine + urea [ARG2] (Mus musculus)
label_lc: arginine + h2o => ornithine + urea [arg2] (mus musculus)