摘要：Skyrin β, β'-dimethyl ether was synthesized by the Ullmann condensation of 8-bromoemodin trimethyl ether followed by a partial demethylation. The structure of skyrin, therefore, was unequivocally established as 2, 4, 5, 2', 4', 5'-hexahydroxy-7, 7'-dimethyl-bianthraquinone-(1, 1').
