| abstract |
The present invention provides an integrase inhibitor. The inventors have found the following compound of formula (I) possessing an integrase inhibitory activity. n n n n n n n n n n n n (wherein, R C and R D taken together with the neighboring carbon atoms form a ring which may be a condensed ring, Y is hydroxyl, mercapto or amino; Z is O, S or NH; R A is a group shown by n n n n n n n n n n n n n n n n (wherein, C ring is N-containing aromatic heterocycle) or the like). |