Estrogenic Compounds: 1, 1'-Bi-(6-methoxy-1, 2, 3, 4-tetrahydroquinoly1), Bis- (2-carboxy-4-hydroxyphenyl) Disulfide, 2, 4, 2', 4'-Tetrahydroxybenzil - Nomura, Yujiro (Nihon kagaku zasshi, 1956)