73986-43-3 8-Chloro-1,3-dimethyl-2-(diphenyl(1-methyl-4-piperidyl)methoxy)purin-6(3H)-one N-Methyl-piperidyl-4-benzhydryl-aether-8-chlor-theophyllinat [German] Purin-6(3H)-one, 8-chloro-1,3-dimethyl-2-(diphenyl(1-methyl-4-piperidyl)methoxy)-