[1] UNIV TOKYO,FAC PHARMACEUT SCI,DEPT ANALYT CHEM,BUNKYO KU,TOKYO 113,JAPAN
[2] SETSUNAN UNIV,FAC PHARMACEUT SCI,DEPT ANALYT CHEM,HIRAKATA,OSAKA 57301,JAPAN
[3] TOKYO METROPOLITAN INST NEUROSCI,DEPT NEUROBIOL,FUCHU,TOKYO 183,JAPAN
[4] UNIV TOKYO,FAC SCI,DEPT BIOPHYS & BIOCHEM,BUNKYO KU,TOKYO 113,JAPAN