67489-34-3 7-Benzylpyrido(1,2-a)piperazin-1-ium chloride hydrochloride 7-Phenylpyrido(1,2-a)-5,6,7,8-tetrahydropyrazinium-chlorid chlorhydrat [German] Pyrido(1,2-a)piperazin-1-ium, 7-benzyl-, chloride, hydrochloride