preferred_name: beta-D-galactose + beta-D-glucose => beta-lactose + H2O
preferred_name_lc: beta-d-galactose + beta-d-glucose => beta-lactose + h2o
label: beta-D-galactose + beta-D-glucose => beta-lactose + H2O
label_lc: beta-d-galactose + beta-d-glucose => beta-lactose + h2o