preferred_name: a long-chain fatty acid(out) <=> a long-chain fatty acid(in)
preferred_name_lc: a long-chain fatty acid(out) <=> a long-chain fatty acid(in)
label: a long-chain fatty acid(out) <=> a long-chain fatty acid(in)
label_lc: a long-chain fatty acid(out) <=> a long-chain fatty acid(in)