Patent ID: 8071650
Filing Date: 2011-12-06
Classification: A61P,C07C,C07D

Abstract:
1. A compound of the following formula (I): or a pharmaceutically acceptable salt thereof, wherein: X represents S, O or —NCN; Y represents NH; R anthracenylmethyl, naphthylmethyl, alkoxycarbonyl or alkylcarbonyloxy (wherein, m is 1, 2, 3 or 4; R 4 and R 5 are independently hydrogen, lower alkyl having 2 to 5 carbon atoms, methanesulfonylamino, lower alkoxy having 2 to 5 carbon atoms, methoxyalkoxy, methoxyalkoxyalkyl, alkoxycarbonyloxy, benzyloxy, acetoxymethyl, propinoyloxymethyl, butoxyalkyl, trimethylacetoxy, or trimethylacetoxymethyl; and R 6 and R 7 are independently hydrogen or lower alkyl having 1 to 5 carbon atoms); R {wherein, n is 1, 2, 3 or 4; R (wherein, R with the proviso that if both R when R when R