TRIAZINONE COMPOUND AND T-TYPE CALCIUM CHANNEL INHIBITOR

摘要

There is provided a novel triazinone compound which has an excellent T-type voltage-dependent calcium channel inhibtory activity and is specifically useful for the treatment of pain. A compound of Formula (I), a tautomer of the compound, a pharmaceutically acceptable salt thereof, or a solvate thereof: where each substituent is defined in detail in the description or claims, for example R1 is H or C1-6 alkoxy, etc., each of L1 and L2 is independently a single bond or NR2, etc., L3 is C1-6 alkylene, etc., A is C6-14 aryl group or 5- to 10-membered heteroaryl which is optionally substituted, etc., B is C3-11 cycloalkylene, etc., D is C6-14 aryl or 5- to 10-membered heteroaryl which is optionally substituted, etc.