Relugolix Impurity 130

1- (4- (1- (2,6-difluorobenzyl) -5- ((dimethylamino) methyl) -3- (6-methoxypyridazin-3-yl) -2,4-dioxo-1,2,3,4-tetrahydrothieno[2,3-d]pyrimidin-6-yl) phenyl) -1,3-dimethoxyurea

1- (4- (1- (2,6-difluorobenzyl) -5- ((dimethylamino) methyl) -3- (6-methoxypyridazin-3-yl) -2,4-dioxo-1,2,3,4-tetrahydrothieno[2,3-d]pyrimidin-6-yl) phenyl) -1,3-dimethoxyurea