... services, to Dr. M. Hrivnac and Mrs. L. Sykora for many preparative GC. and to Dr. P. Schudel for his continuing interest in this work. The skillful help of Miss U. Schurer and Mr. Y.-St. ... (liq.): 2970, 2920, Page 9. HELVETICA CHIMICA ACTA - Vol. 61, Fasc. 7 (1978) - Nr. 224 2359 ...