preferred_name: vanillin + formaldehyde => 2-methoxy-4-vinylphenol + O2
preferred_name_lc: vanillin + formaldehyde => 2-methoxy-4-vinylphenol + o2
label: vanillin + formaldehyde => 2-methoxy-4-vinylphenol + O2
label_lc: vanillin + formaldehyde => 2-methoxy-4-vinylphenol + o2