Optical rotations were
measured on a Rudolph Autopol IV polarimeter at a wavelength of
50 nm. ECD spectra were recorded at 25 °C on a Jasco-715
spectrophotometer. IR spectra were recorded on a Perkin-Elmer 1600
FT IR spectrophotometer as KBr pellets Optical rotations were
measured on a Rudolph Autopol IV polarimeter at a wavelength of
50 nm. ECD spectra were recorded at 25 °C on a Jasco-715
spectrophotometer. IR spectra were recorded on a Perkin-Elmer 1600
FT IR spectrophotometer as KBr pellets