preferred_name: agmatine(in) + L-arginine(out) => agmatine(out) + L-arginine(in)
preferred_name_lc: agmatine(in) + l-arginine(out) => agmatine(out) + l-arginine(in)
label: agmatine(in) + L-arginine(out) => agmatine(out) + L-arginine(in)
label_lc: agmatine(in) + l-arginine(out) => agmatine(out) + l-arginine(in)