The present invention provides a T-type calcium channel inhibitor which is a compound represented by formula (1), a pharmaceutically acceptable salt of this compound or a solvate of this compound. The present invention also provides: this T-type calcium channel inhibitor; a pharmaceutical product containing this T-type calcium channel inhibitor; and a therapeutic agent or prophylactic agent for diseases, the effective action of which is a T-type calcium channel inhibitory action. (In formula (1), each of R1 and R2 independently represents H, —OH or —OR11 wherein R11 represents a C1-3 alkyl group; each of R3 and R4 independently represents H, —OH or —OR12, wherein R12 represents a C1-3 alkyl group; and each of R5 and R6 independently represents H, a halogen atom, a C1-10 alkyl group, a C2-6 alkenyl group, a C2-6 alkynyl group, a phenyl group (which may be substituted by a C1-6 alkoxy group or a halogen atom), a —C1-3 alkyl-phenyl group (which may be substituted by a C1-6 alkyloxy group or a halogen atom) or a C10-50 prenyl group.)
本发明提供了一种 T 型
钙通道
抑制剂,它是由式(1)代表的化合物、该化合物的药学上可接受的盐或该化合物的溶液。本发明还提供:这种 T 型
钙通道
抑制剂;含有这种 T 型
钙通道
抑制剂的药品;以及一种治疗剂或疾病预防剂,其有效作用为 T 型
钙通道抑制作用。式(1)中,R1 和 R2 各自独立地代表 H、-OH 或-OR11,其中 R11 代表 C1-3 烷基;R3 和 R4 各自独立地代表 H、-OH 或-OR12,其中 R12 代表 C1-3 烷基;R5和R6各自独立地代表H、卤素原子、C1-10烷基、C2-6烯基、C2-6炔基、苯基(可被C1-6烷氧基或卤素原子取代)、-C1-3烷基苯基(可被C1-6烷氧基或卤素原子取代)或C10-50链烯基。)