00397nam a2200121Ia 4500008004100000022001400041040001100055100001900066245012800085260003500213300001700248300001000265251112s9999||||xx |||||||||||||| ||und||  a0040-4039  aCNCLSA  aDr. T. Stephen 0aTetrahedron LettersbThe International Journal For the Rapid Publication of Preliminary Communications in Organic Chemistry  c1982bpergamon pressaNew York  aP. 3737-4632  bV. 23