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