preferred_name: 2-phenylethylamine(in) <=> 2-phenylethylamine(out)
preferred_name_lc: 2-phenylethylamine(in) <=> 2-phenylethylamine(out)
label: 2-phenylethylamine(in) <=> 2-phenylethylamine(out)
label_lc: 2-phenylethylamine(in) <=> 2-phenylethylamine(out)