(Deamino-Phe19,D-Ala24,D-Pro26-psi(CH2NH)Phe27)-GRP (19-27) (human, porcine, canine) Trifluoroacetate, Deamino-Phe-His-Trp-Ala-Val-D-Ala-His-D-Pro-psi(CH2NH)Phe-NH2, 142061-53-8, C57H72N14O8, Mr 1081.29, 1mg. BW-10, BW2258U89. BW10 (or BW2258U89, Deamino-Phe-His-Trp-Ala-Val-D-Ala-His-D-Pro- psi(CH2NH)-Phe-NH2), a bombesin receptor antagonist, potently inhibits bombesin-evoked release of gastrointestinal hormones from rats and dogs, in vitro and in vivo.