By bridging 1,3:4,6-bis(3,6-dihydroxy-1,2-xylylene)tetrahydro-3a,6a-diphenyl imidazo-[4,5]-imidazole-2,5(lH,3H)-dione 1 with S(CH2CH2OCOCH2Cl)2, thiacrown molec
The positive and negative ESI-MS/MS spectra of N-ethoxy(phenyl) phosphoryl amino acids(EPP-AA) were investigated by electrospray ionization(ESI) ion trap mass s