1-(2-Benzofuranylcarbonyl)-4-benzylpiperazine 41716-84-1 41717-30-0 Befuralina [INN-Spanish] Befuraline Befuraline [INN] Befuralinum [INN-Latin] N-Benzo(b)furan-2-ylcarbonyl-N'-benzylpiperazine hydrochloride