... catalysis by L-proline in aldolizations, Pedersen’s crown ethers, syntheses of corrins,hydroporphyrins, and vitamin B12. Essays in Contemporary Chemistry From Molecular Structure towards Biology VHAC Essays ... in them a little. Essays in Contemporary Chemistry: From Molecular Structure towards Biology. Edited by Gerhard Quinkert andM. Volkan Kisakürek © Verlag Helvetica Chimica Acta, Postfach, CH-8042 ... Biology VHAC Essays in Contemporary Chemistry: From Molecular Structure towards Biology. Edited by Gerhard Quinkert andM. Volkan Kisakürek © Verlag Helvetica Chimica Acta, Postfach, CH-8042 Zürich,...