The compounds of formula I-IV:
##STR1##
wherein n is an integer of from 1 to 4, or pharmaceutically acceptable
salts thereof are useful to prevent and treat visceral pain and
gastrointestinal disorders.
Os compostos da fórmula I-IV: ## do ## STR1 wherein n é um inteiro de 1 a 4, ou pharmaceutically sais aceitáveis disso seja útil impedir e tratar a dor visceral e disorders gastrointestinal.
