00262nam a2200097Ia 4500008004100000040001100041245003500052260005300087300001400140300001000154251112s9999||||xx |||||||||||||| ||und||  aCNCLSA 0aJournal of Medicinal Chemistry  cJuly, 1981bThe National Cancer InstituteaU.S.A  aP. 1-1038  bV. 68