00386nam a2200109Ia 4500008004100000022001400041040001100055100001900066245012800085260004600213300001700259251112s9999||||xx |||||||||||||| ||und||  a0040-4039  aCNCLSA  aDr. T. Stephen 0aTetrahedron LettersbThe International Journal for the Rapid Publication of Preliminary Communications in Organic Chemistry  cSeptember, 1979bPergamon PressaNew York  aP. 3487-4334