the capillary gas chromatographic negative ion chemical ionization mass spectrometric assay of peptidoaminobenzophenone ( 2-o-chlorobenzoyl-4-chloro-n-methyl-n'-glycylglycinanilide ) ( 1 ) and its three metabolites in human plasma reported in part 1 was changed as follows : ( 1 ) the reagent gas was changed to ammonia from isobutane ;
C0017110
gas
C0002607
ammonia