1,3,4,5-Tetrahydro-4-methyl-5-(1-oxo-2-butenyl)-2H-1,5-benzodiazepin-2-one 144400-94-2 2H-1,5-Benzodiazepin-2-one, 1,3,4,5-tetrahydro-4-methyl-5-(1-oxo-2-butenyl)-