“…Such heterogeneous distribution pattern in the liver has been occasionally observed by autoradiography for labeled chloropromazine (5), irnipraSend reprint requests to: T. Fujii, Research Laboratories, Dainippon Pharmaceutical Co., Ltd., Enoki 33-94, Suita, Osaka, 564 Japan. mine (6), aminotriazole (7), chloroform (8), hexachlorobinephyl (9) and others (10)(11)(12)(13)(14). The pattern is rather rare since, in general, radioactive compounds are distributed relatively evenly in the liver.…”