preferred_name: formaldehyde + 2 chloride + 2 H(+) => dichloromethane + H2O
preferred_name_lc: formaldehyde + 2 chloride + 2 h(+) => dichloromethane + h2o
label: formaldehyde + 2 chloride + 2 H(+) => dichloromethane + H2O
label_lc: formaldehyde + 2 chloride + 2 h(+) => dichloromethane + h2o