| abstract |
A novel benzofuran derivative of the formula:n wherein R¹ is hydrogen atom, a lower alkoxy group or a halogen atom, one of R² and R³ is a lower alkyl group and the other is a lower alkyl group or a phenyl-lower alkyl group, or R² and R³ combine together with adjacent nitrogen atom to form a heteromonocyclic group, Ring A is a substituted or unsubstituted phenyl group, Y is oxygen atom or sulfur atom and n is an integer of 2 or 3, and processes thereof are disclosed. n The compound (I) or a pharmaceutically acceptable salt thereof has a potent inhibitory activity against reflective contractions of urinary bladder. |