... h. SKINSER, JIPNA c. THEISEN, ASD CHOZO 1IITOhI.4 Departnients of I'harmaceutzcal Chemistry und BLOC ... The P\'aHC03 extract was acidified to pH 1 with 3 -Y HC1, extracted with ... acids (XIII) by the same pro- cediire used for 4-bromoacetylphenylalanine (VII) (see Table 11). ...