'H NMR spectra were recorded at 60 MHz with a Hitachi R-24 spectrometer. Measurements were made in CDC13 solution containing tetramethylsilane as an internal standard and in DzO with the sodium salt of 3-(trimethylsilyl) propanesulfonic acid (DSS) as the intemal standard. IR spectra were measured as KBr pellets and recorded on an IR-27 Shimadzu spectrophotometer. UV spectra were measured with Hitachi spectrometer, Model 124. ...
