 Lili K. Doerfel

Lili K. Doerfel coauthored research on proline.^[ref]

Proline is a cyclic alpha-amino acid whose amine nitrogen is joined to two carbon positions within a five-membered ring. This explains the exception to ${\mathrm{H}}_2\mathrm{N}-\mathrm{CH}(R)-\mathrm{COOH}$ in amino acid.