00370nam a2200109Ia 4500008004100000040001100041100001900052245012600071260003900197300001300236300001100249251112s9999||||xx |||||||||||||| ||und||  aCNCLSA  aDr. T. Stephen 0aTetrahedron LettersbThe International Organ For the Rapid Publication of Preliminary Communications in Organic Chemistry  cMay 1983bPergamon PressaNew York  aP. 1-543  bV. 173