| abstract |
The present invention provides a novel compound that has an inhibition activity of the upper Na + channel. That is, it provides a compound represented by the following formula (I), salts thereof or their hydrates. (see formula) In the formula, ring A represents a ring represented by the formula: (see formula) (where Rl represents a hydrogen atom. etc .; and R2 represents a hydrogen atom and the like), etc .; W represents an optionally substituted C1-C6 alkylene group, etc .; Z represents a C6-C14 aromatic hydrocarbon cyclic group, etc .; and 1 represents an integer from 0 to 6. |