... la When acetic acid-ammonium formate was (5) "Handbook of Chemistry and Physios," 41st ed, Chemical Rubber Co., Cleveland, Ohio, 1960, p 1744. ... (7) H. Budaikiowicz, C. Djerassi, and DH Williams, "Interpretation of Mass Spectra of Organic Compounds," Holden ... 2998 J . Org ...