1,5-Dihydro-4H-pyrimido(4,5-b)(1,4)thiazine-4,6(7H)-dione dihydrazone 4H-Pyrimido(4,5-b)(1,4)thiazine-4,6(7H)-dione, 1,5-dihydro-, dihydrazone 55383-68-1 BRN 0533795