4-(10-methoxy-1,2,4a,5-tetrahydropyrazino[2,1-c][1,4]benzoxazin-3(4H)-yl)butylamine 、
Ethyl 2-chloro-7-isocyanatothieno[2,3-b]pyrazine-6-carboxylate 生成 (-) 3-[4-(10-methoxy-1,2,4a,5-tetrahydropyrazino[2,1-c][1,4]benzoxazin-3(4H)-yl)butyl]-8-chloropyrazino[2',3':4,5]thieno[3,2-d]pyrimidine-2,4(1H,3H)-dione dihydrochloride