preferred_name: (6S)-5,6,7,8-tetrahydrofolate + formaldehyde => (6R)-5,10-methylene-5,6,7,8-tetrahydrofolate + H2O
preferred_name_lc: (6s)-5,6,7,8-tetrahydrofolate + formaldehyde => (6r)-5,10-methylene-5,6,7,8-tetrahydrofolate + h2o
label: (6S)-5,6,7,8-tetrahydrofolate + formaldehyde => (6R)-5,10-methylene-5,6,7,8-tetrahydrofolate + H2O
label_lc: (6s)-5,6,7,8-tetrahydrofolate + formaldehyde => (6r)-5,10-methylene-5,6,7,8-tetrahydrofolate + h2o