preferred_name: 7-dehydrocholesterol(in) = 7-dehydrocholesterol(out)
preferred_name_lc: 7-dehydrocholesterol(in) = 7-dehydrocholesterol(out)
label: 7-dehydrocholesterol(in) = 7-dehydrocholesterol(out)
label_lc: 7-dehydrocholesterol(in) = 7-dehydrocholesterol(out)