preferred_name: taurocholate + L-arginine <=> L-arginocholate + taurine
preferred_name_lc: taurocholate + l-arginine <=> l-arginocholate + taurine
label: taurocholate + L-arginine <=> L-arginocholate + taurine
label_lc: taurocholate + l-arginine <=> l-arginocholate + taurine