Abstract: | The 13C n.m.r. spectra of the major human urinary metabolite of prostaglandin PGE2 and PGE1 are discussed together with some unsaturated precursors. Δ-2-Pyrazolines, formed by addition of diazomethane to the 11-oxo dienediones in this series, were identified by 13C and 1H n.m.r. and by other physical methods. |