As a further phanmacomodulation of benzamide derivatives, two structural modifications were introduced by synthesizing pyridinesulfonamides 5 and 6 (Scheme). The pharmacological profile of substituted benzamides such as metoclopramide (2) is not retained in the pyridine-sulfonarm'des 6: the latter have very low toxicity but do not exhibit any affinity for D2 and 5-HT2 receptors, and gastrointestinal