4-Piperidinoacetyl-3,4-dihydro-2H-1,4-benzoxazine hydrochloride , its cas register number is 49830-98-0. It also can be called BU 533 ; 2H-1,4-Benzoxazine, 3,4-dihydro-4-(1-piperidinylacetyl)-, monohydrochloride .