| abstract |
A novel diaminomethylidene derivative respresented by general formula (I) and a pharmacologically acceptable salt thereof, wherein R1 represents hydrogen, C1-C6 alkyl, C3-C6 cycloalkyl, etc.; R2 represents, for example, a group represented by any of general formulae (a), (b), (c), (d), (e) and (f); R3 represents hydrogen, C1-C6 alkyl, etc.; and X represents O, S, CHNO2, C(COOR4)2, C(COOR4)CN, C(CN)2, etc. This compound is useful as a gastrointestinal excitomotor for treating digestive diseases. |