A substance capable of stimulating the movement of digestive tract,
comprising a compound of the formula: (I) (active substance .alpha. and
active substance .beta. being stereoisomers), which substance is derived
from natural products and hence cause no side effects, is highly safe
even when continuously used for a prolonged period of time and can be
widely employed as additives to refreshments, etc.; and a refreshment
containing an additive comprising the stimulating substance. In
particular, a digestive tract movement stimulating substance capable of
acting on muscarine M.sub.3 receptor, obtained from beer through
isolation and purification, which substance is one having drinkability
stimulating effect; and a composition from natural products or natural
processed products, comprising the above substance. The thus provided
substance or composition is used as an additive to refreshment, thereby
providing a refreshment capable of stimulating the movement of digestive
tract.