A novel series of potent CCK-A and CCK-B dual antagonists has been pre
pared which incorporate a methyl substituent at the 9 position of a 1,
4-benzodiazepine ring system. FR193108 ((+)-11) was selected for furth
er biological evaluation, and is expected to be more efficacious than
CCK-A selective antagonists for the treatment of pancreatitis, since i
t has high and well-balanced affinities for both CCK-A and -B receptor
s. (C) 1997, Elsevier Science Ltd.