MASS-SPECTRA OF N-BUTYLBORONATE ESTER DERIVATIVES OF THE MAJOR METABOLITE OF PROSTAGLANDIN-F

The El mass spectra of six n-butylboronate ester derivatives of the major metabolite of prostaglandins F1alpha and F2alpha (PGF-M) are presented and discussed. Proposed ion assignments and fragmentation pathways are based on substituent shifts, on data from a deuterium-labeled methoxime derivative and on the analysis of collision-induced dissociation spectra of selected ions. Fragment ions suitable for identification and quantification of PGF-M in a biological matrix and diagnostically valuable ions for structure recognition are proposed.