2970
COMMUNICATIONS TO THE EDITOR
Vol. 82
i0.2; adenine:pentose: total ??:labile P = 1: 1: 2 : 1. Found: C, 46.0, 45.7;H, 4.32, 1.20; N, 13.7; P, 9.30, 9.56; adenine:pentose:total P:labile P = 1: 0.97 : 1.98 : 0.98), which is indistinguishable from an authentic sample by mixture m.p., comparison (Jf infrared and ultraviolet spectra, and mobility in paper chromatographic and electrophoretic systems, and which is enzymatically active (pyru\-ate kinase coupled with lactic dehydrogenase).l 4 Solutions of AMP-I, prepared from A X P momhydrate and excess CDI, react with phosphoric ncid to produce a mixture of compounds, the nature o f which will be described in a future coiiimunication.
sample: Rf 0.381 (BElY 4l5), 0.267 (AA)] and L-serine DNP, [ " ] Z ~ D + 6 S o ir 0.25, 4yo aq. &aHCOs), lif0.365 (BEW 415), 0.340 (-U)[authentic sample: Rf 0.365 (BEW 413), 0.240 (Ah)]. Identical oxidation of N-2,4-dinitrophenyl-~-ghicosaminol, m.p. 163-164' [A-nal. Found: C, 41.46; H , 4.94; N, 11.74.1, also gave L-serine D N P , [cY]'~D f66" (c 0.325, 4% XaHC03), I
