'compound, medicament, beta-amyloid production inhibitor, gamma secretase modulator, methods for inhibiting beta-amyloid production, for modulating gamma secretase, and for preventing or treating mild or alzheimer's cognitive impairment, and, use of compost. '

摘要

compound, medicament, beta-amyloid production inhibitor, gamma-secretase modulator, methods for inhibiting beta-amyloid production, for modulating gamma-secretase, and for preventing or treating mild or alzheimer's cognitive impairment, and use of the compound. The present invention provides a heterocycle derivative having superior Î ± -amyloid production inhibitory activity and / or superior γ-secretase modulation activity, and use thereof. a compound represented by formula (i): wherein each symbol is as defined in this specification, or a salt thereof.