Heterocyclic compound and use thereof

A compound represented by the formula (I):

• wherein
• ring A is an optionally substituted oxazole ring, an optionally substituted triazole ring, an optionally substituted imidazole ring, an optionally substituted pyridine ring, or an optionally substituted pyrazole ring,
• ring B is an optionally substituted benzene ring, an optionally substituted pyridine ring, or an optionally substituted pyrimidine ring, and
• partial structure (1):
• is
• wherein
• R1 and R2 are the same or different and each is a substituent,
• L is a bond, —Y—, —O—, —YO—, —OY—, —S—, —SO—, —SO2—, —CONRa—, —NRaCO—, —NRa—, —YNRa—, —NRaY—, —YCONRa—, —NRaCOY—, —OCONRa—, —NRaCOO— or —NRbCONRa—
• wherein
• Y is an optionally substituted C1-6 alkylene group,
• Ra is a hydrogen atom or an optionally substituted C1-6 alkyl group,
• Rb is a hydrogen atom or an optionally substituted C1-6 alkyl group,
• R3 is a substituent, and
• n is an integer of 0-6,
• provided that 2-{(8R)-3-[3-Methoxy-4-(2-methyl-1,3-oxazol-5-yl)phenyl]-8-(3,4,5-trifluorophenoxy)-5,6,7,8-tetrahydro[1,2,4]triazolo[4,3-a]pyridin-8-yl}propan-2-ol is excluded,
• or a salt thereof.