| abstract |
(57) [Summary] [Structure] General formula [Chemical formula 1] [In the formula, n represents an integer of 1 to 7, B in each nucleotide unit independently represents a nucleobase, and X represents S and O atoms independently. However, at least X One of them is S. ] The compound or its salt represented by these. [Effect] The compound of the present invention is useful as a therapeutic or prophylactic agent for AIDS diseases. |