00383nam a2200109Ia 4500008004100000022001400041040001100055100001900066245012600085260004500211300001700256251112s9999||||xx |||||||||||||| ||und||  a0040-4039  aCNCLSA  aDr. T. Stephen 0aTetrahedron LettersbThe International Organ For the Rapid Publication of Preliminary Communications in Organic Chemistry  cNovember, 1976bPergamon PressaNew York  aP. 4013-4394