Patent ID: 10407395

Abstract:
The present invention provides a medicament for treating a disease involving Nav 1.7 such as neuropathic pain, nociceptive pain, inflammatory pain, small-fiber neuropathy, erythromelalgia, paroxysmal extreme pain disorder, dysuria, and multiple sclerosis, which comprises a compound of formula (I): or a pharmaceutically acceptable salt thereof, wherein R1a, R1b, R1c and R1d are hydrogen, halogen, cyano, C1-4 alkyl, C1-4 alkoxy, or the like, provided that at least one of R1a, R1b, R1c and R1d is C6-10 aryl, C6-10 aryloxy, or the like, R2 and R3 are hydrogen, C1-6 alkyl, C3-10 cycloalkyl, or the like, R4 is hydrogen, C1-6 alkyl, C3-7 cycloalkyl, or the like, m is 1, 2 or 3, L is CR7R8, and R7 and R8 are hydrogen, hydroxyl, C1-4 alkyl, C1-4 alkoxy, or the like.