1. Heimei Yuki, Yoshio Okamoto, Yoshiko Kobayashi.
Poly(beta-Amino acids). VI. Synthesis and conformational properties of poly[(r)-3-pyrrolidinecarboxylic acid.
Journal of Polymer Science: Polymer Chemistry Edition V17 i.12, Pages 3867 - 3878 (1979)
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http://dx.doi.org/10.1002/pol.1979.170171207Synthesis of (3R)-carboxy pyrrolidine (a β-proline analogue) and its oligomer
Bioorganic & Medicinal Chemistry Letters V. 10, i 21, Pages 2417-2419 (2000)
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http://dx.doi.org/10.1016/S0960-894X(00)00486-8