2-(10-methoxy-1,2,4a,5-tetrahydropyrazino[2,1-c][1,4]benzoxazin-3(4H)-yl)ethylamine 、
Ethyl 2-chloro-7-isocyanatothieno[2,3-b]pyrazine-6-carboxylate 生成 (+) 3-[2-(10-methoxy-1,2,4a,5-tetrahydropyrazino[2.1-c][1,4]benzoxazin-3(4H)-yl)ethyl]-8-chloropyrazino[2',3':4,5]thieno[3,2-d]pyrimidine-2,4(1H, 3H)-dione dihydrochloride